USING THE BEILSTEIN DATABASE IN ACADEMIC RESEARCH LIBRARIES

by Gary Wiggins
Indiana University Chemistry Library
Bloomington, IN 47405

as delivered at the American Chemical Society Meeting, Chicago, August 26, 1993


        
             There  have been many cancellations of subscriptions to  the 
        
        printed  Beilstein Handbook of Organic Chemistry among U.S.  aca-
        
        demic libraries in the past two decades.  As an academic  chemis-
        
        try  librarian  at Indiana University for nearly  18  years,  the 
        
        author  has  participated in a number of surveys by  the  Special 
        
        Libraries  Association and other professional groups designed  to 
        
        determine  which libraries continue to maintain subscriptions  to 
        
        expensive  reference  sets.   Each succeeding  survey  reveals  a 
        
        dwindling  number of subscribers to Beilstein.  Cancellations  of 
        
        Beilstein  certainly took place in academic  institutions  before 
        
        the availability of the Beilstein Database. But, the fact that an 
        
        alternative "pay-as-you-go" source of information is now accessi-
        
        ble  online is seen in some quarters as a compelling argument  to 
        
        cancel  the printed subscription.  Several librarians  have  pub-
        
        lished  in the library literature studies of the cost-benefit  of 
        
        maintaining a print subscription to Beilstein.  Invariably,  they 
        
        have  concluded  that in their  institutions,  printed  Beilstein 
        
        subscriptions should be stopped.(1)  


             The  cost  of a print subscription to  Beilstein  has  risen 
        
        dramatically in recent years, over 50 percent since 1989/90.
        
        
        
        
                            1993/94        $32,041
                            1992/93        $31,743
                            1991/92        $31,351
                            1990/91        $23,945
                            1989/90        $21,185
                            1988/89        $21,764
        
        Table  1. Print Subscription Payments for the Beilstein  Handbook 
        at Indiana University, Fiscal Years 1989-1994.
        
        
        By  way of contrast, the full subsidy provided to  the  end-users 
        
        atall  eight campuses of Indiana University for online  searching 
        
        of  STN  International's CAS ONLINE Academic  Program  files  has 
        
        risen  90-130 percent since 1989/90.  In fact, CAS  ONLINE  costs 
        
        exceeded  the printed Beilstein subscription cost in one  of  the 
        
        last three complete fiscal years, 1991/92.
        
        
        
                            1992/93        $27,203
                            1991/92        $32,953
                            1990/91        $22,177
                            1989/90        $14,295
        
        Table  2.  CAS ONLINE Academic Program Search  Costs  at  Indiana 
        University, Fiscal Years 1990-1993.
        
        
             It  has  been  projected that the fifth  supplement  to  the 
        
        printed Beilstein Handbook covering 1960-79 will be completed  by 
        
        the  year 2000.  Furthermore, due to reduced production costs,  a 
        
        prediction  was recently made that the cost of the printed  Beil-
        
        stein will not be higher in future years than it was in 1993.(2)      
        
             The  authors  of  one of the recent articles  on  the  cost-
        
        effectiveness  of  Beilstein conjecture  that,  "Neither  library 
        
        staff  nor  the chemistry community may be familiar  enough  with 
        
        Beilstein to maximize its effectiveness."(3) If that  possibility 
        
        exists for the printed Beilstein, the same could be true for  the 
        
        Beilstein Database.  The Beilstein Database currently has  infor-
        
        mation on over 5.3 million compounds.  In late 1988, the database 
        
        was  loaded on the STN International system, followed in  October 
        
        1989 by DIALOG.  In light of the availability of the online  file 
        
        and  the  complementary Beilstein Current  Facts  CD-ROM  product 
        
        which  covers  the literature from 1990 to the  present,  it  was 
        
        decided  to conduct a survey of academic libraries  to  determine 
        
        the  level  of usage of both the print and  electronic  products.  
        
        Since  the author views the complete Beilstein product line as  a 
        
        "database,"  the  survey was not limited to electronic  forms  of 
        
        Beilstein.
        
        
        
                       Methodology, Population, and Sample
        
             The lack of both time and resources to conduct a  full-scale 
        
        scientific  inquiry  led to the decision to  concentrate  on  the 
        
        academic subscribers to the Chemical Information Sources  Discus-
        
        sion  List  (CHMINF-L).  CHMINF-L is a LISTSERV  electronic  mail 
        
        discussion  group, which at the time of the survey had  over  650 
        
        subscribers from a variety of organizations.  
        
             It  is difficult to determine exactly how many of  the  sub-
        
        scribers  to  CHMINF-L are at academic institutions  due  to  the 
        
        idiosyncrasies  of the Internet Domain Name System.  However,  at 
        
        least 125 different academic institutions were represented  among 
        
        the  subscribers on July 1, 1993.  It was assumed that the  chem-
        
        ists and librarians using a source such as CHMINF-L are among the 
        
        more computer-literate potential users of the Beilstein Database.  
        
        No  attempt  was made to contact other  categories  of  potential 
        
        users.
        
             On  June 1, 1993, a request for assistance in designing  the 
        
        questionnaire  was sent to 34 librarians who were  CHMINF-L  sub-
        
        scribers  on  that date.  These  people  were 
        
        selected  because  they were thought to  be  knowledgeable  about 
        
        Beilstein,  as judged from the quality of their contributions  to 
        
        CHMINF-L  or from past discussions of Beilstein with the author.  
        
        Three  library  school professors who  teach  science  literature 
        
        courses  were  included among the 34 in that  group.   Seven  re-
        
        sponses resulted from the inquiry.  In addition, a discussion  of 
        
        the planned survey was held with six chemistry librarians on June 
        
        8, 1993 at the Special Libraries Association National Conference.  
        
        The  feedback received from these efforts led to the  development 
        
        of the preliminary questionnaire which was evaluated by a chemist 
        
        who has taught chemical literature courses.  The final version of 
        
        the questionnaire was distributed via CHMINF-L 
        
        on  July 7, 1993, with responses requested by July 26.   After  a 
        
        reminder  was sent to CHMINF-L on July 19, a total of  35  usable 
        
        responses from 33 different academic institutions was received by 
        
        August  1.   Five of the responses were from people  outside  the 
        
        United States. 
        
             Twenty five of the respondents were librarians, and ten were 
        
        chemists.  Of those ten, eight were faculty members in  chemistry 
        
        or  a  related  science, one was a staff member  in  a  chemistry 
        
        department,  and one was a graduate student.  Twenty  one  people 
        
        listed  themselves  as  staff members in a  library  that  serves 
        
        chemists.
        
                                     Results
        

        I. Use of the Beilstein Database and Current Facts.
        
             Twenty  six  of the respondents had searched  the  Beilstein 
        
        Online  Database in the past 12 months, with over half  of  those 
        
        being rather infrequent searchers.  All but one of them performed 
        
        the searches themselves, and a number commented that the searches 
        
        were done as intermediaries for others.
        
        
        
                       6 times or less          9
                       1 time per month         7
                       2-5 times per month      7
                       6-10 times per month     2
                       > 10 times per month     1
                                             ----
                                               26






        
        Table  3.  Frequency of Searching the Beilstein Database  in  the 
        Past 12 Months.
        
        
        In about half of the institutions (N=16), costs of searching  the 
        
        Beilstein Database are subsidized, but at eleven places there  is 
        
        definitely no subsidy.
        
             Since  January  1992, academic subscribers  to  the  printed 
        
        Beilstein Handbook of Organic Chemistry or the Gmelin Handbook of 
        
        Inorganic  and Organometallic Chemistry or the Beilstein  Current 
        
        Facts  CD-ROM  LAN version have been eligible for  the  "Springer 
        
        Chemistry  Academic Program on STN."(4)  The main features of the 
        
        program are:
        
             - an 80 percent discount on the usage of the Beilstein,
               Gmelin Online, and Gmelin Formula Index Databases
        
             - a cap each year on the maximum payment of DM 10,000
               per account number and per database
        
             - database is accessible whenever STN can be searched.
        
        
             STN is the overwhelming choice of vendor on which to  search 
        
        the  Beilstein Database at the responding  institutions.   Twenty 
        
        nine  people  search  Beilstein  on STN,  whereas  only  six  had 
        
        searched  the database on DIALOG.  Even those six indicated  more 
        
        use is made of the STN system.  However, only thirteen of the re-
        
        sponding  institutions  receive the 80 percent discount,  all  of 
        
        them  because  of  subscriptions  to one or  both  of  the  print 
        
        products.        

             Significant  numbers of cancellations of the  printed  Beil-
        
        stein  have  occurred in the academic institutions  in  the  past 
        
        decade.
        
        
                       Canceled in:        N
        
                            1991-93        8
                            1988-90        4
                            1985-87        3
                      Prior to 1985        5
                                         ---
                                          20
        
        Table 4. Currency of Beilstein Print Cancellations.
        
        
        The availability of the Beilstein Database was a factor in  eight 
        
        of the cancellation decisions, but one person stated,  "...online 
        
        availability  was used as a 'ploy' to mollify faculty  who  might 
        
        have  objected."   Whatever  the reason  for  the  cancellations, 
        
        budgetary savings apparently resulted for all of the institutions 
        
        which  canceled.   None  reported spending as  much  recently  on 
        
        searching the database as was spent to maintain a full  subscrip-
        
        tion  to  the printed Beilstein, with one  respondent  indicating 
        
        "...less  than  $200 spent online last year,  and  probably  much 
        
        less."
        
             Interestingly,  the availability of the 80 percent  discount 
        
        for online searching of the Beilstein Database was not  perceived 
        
        as  an important factor for deciding whether to continue to  sub-
        
        scribe  to  one or both printed handbooks.  Seventeen  of  twenty 
        
        four  respondents  said it was of little or  no  importance,  six 
        
        considered  it somewhat important, and only one described  it  as 
        
        very important.  However, there is relatively little support  for 
        
        continuation of the printed Beilstein after the completion of the 
        
        Fifth  Supplement.   Twenty one of thirty  respondents  indicated 
        
        they do not want the printed version to continue.
        
             The  Beilstein  Database is not  perceived  as  particularly 
        
        difficult  to  search.   Sixteen of 29 respondents  felt  it  was 
        
        either less difficult (N=2) or about the same level of difficulty 
        
        (N=16)  as other databases.  Three even stated that no  databases 
        
        are  difficult to search.  However, ten people categorized  Beil-
        
        stein as more difficult than other databases with which they were 
        
        familiar.  The great majority (21 of 27) think that the  database 
        
        is  less  difficult to search than the printed Beilstein.   If  a 
        
        front-end  software interface is used to search the database,  it 
        
        is  likely to be STN Express.  Eleven of the  twenty  respondents 
        
        reported using STN Express.
        
             The  database is searched for a variety of purposes in  aca-
        
        demic institutions.  These include reference, teaching, and  even 
        
        as  an  index to the printed source.  Respondents were  asked  to 
        
        rank their uses of the database using the following scale:
        
             1 = rarely or never used for this purpose
        
             2 = sometimes used for this purpose
        
             3 = frequently used for this purpose.
        
        
             Use           Raw Score        Total Score   _N_    Average
                           3   _2   _1
        
        ready reference    7   11   10          53         28      1.89
        comprehensive data 6   12   10          52         28      1.86
        teaching tool      2    5   19          36         26      1.35
        rxn/preparation   10   11    6          58         27      2.15
        other              -    -    9           9          9      1.00
        
        Table 5. Uses of the Beilstein Database.
        
        
        The  data indicate that users of the Beilstein Database are  fre-
        
        quently  seeking  to find reaction  or  preparation  information.  
        
        Somewhat less frequently, they are searching for quick access  to 
        
        particular data or performing exhaustive searches for data.   The 
        
        database is used relatively infrequently in teaching.
        
             In  comparison  to other databases  containing  physical  or 
        
        chemical property data, the Beilstein Database is clearly seen by 
        
        the  respondents  as  superior.  Eighteen of  twenty  six  people 
        
        viewed  it as more useful than other databases they had  searched 
        
        for this purpose, three felt it was about the same, and only  two 
        
        considered  it less useful.  Although the Beilstein Database  was 
        
        not  viewed  by most respondents as  overwhelmingly  better  than 
        
        others  for reaction or preparation information, six of  the  re-
        
        spondents  believe it is better for this purpose, six feel it  is 
        
        about the same, and six consider it less useful.  The respondents 
        
        had searched a wide variety of databases in both categories,  but 
        
        most frequently they were comparing Beilstein to the CA File:  in 
        
        9  cases for physical/chemical properties and 17 cases for  reac-
        
        tion/preparation  information.   Next most  frequently  mentioned 
        
        were Gmelin (N=7) and CASREACT (N=6), respectively.
        
             The capability to search the Beilstein Database by structure 
        
        is  seen  as somewhat important or very important by  twenty  two 
        
        people (11 each).  However, seven consider structure searching of 
        
        the file to be of little or no importance.
        
             For  primary  research published after 1979,  the  Beilstein 
        
        Database  includes  references  to literature almost  up  to  the 
        
        present.  The entries for the post-EV data contain actual numeri-
        
        cal values only for these five properties: boiling point, melting 
        
        point,  density,  optical rotatory power, and  refractive  index.  
        
        While all of these are considered by the respondents to be useful 
        
        properties  to have in the database, they were less  enthusiastic 
        
        about the last two.  When asked to rank the properties on a scale 
        
        which had:
        
                  1 = of little or no use
        
                  2 = somewhat useful
        
                  3 = very useful,
        
        the average scores showed boiling point and melting point tied at 
        
        2.54, with density a close third at 2.44.  Optical rotatory power 
        
        scored 1.96, and refractive index, 1.69.

             A  minority of the institutions responding have made  avail-
        
        able the Beilstein Current Facts CD-ROM product; only ten of them 
        
        have  it.  Of those that do, eight of the ten keep Current  Facts 
        
        in the library, one has it in an office, and another in a labora-
        
        tory.  Only three respondents felt that the CD-ROM has led to  an 
        
        increase  in  searching the Beilstein Database.   However,  seven 
        
        believe it has increased the use of the printed Beilstein.  There 
        
        is  more  use made of Current Facts than the database by  six  of 
        
        nine  respondents, but also less use made of Current  Facts  than 
        
        the printed Beilstein by five of the ten respondents.  Six of the 
        
        ten  feel  that the ability to search Current Facts  by  chemical 
        
        structure is very important, three view it as somewhat important, 
        
        and only one felt it was of little or no importance.
        
        
        
        II. Use of the Printed Beilstein Handbook of Organic Chemistry.
        
             A  few  additional general questions were  asked  about  the 
        
        printed  Beilstein.  Earlier in this paper, it was noted  that  a 
        
        significant number (22 of 33) of the responding institutions  had 
        
        canceled the printed Beilstein.  It was of interest to  determine 
        
        what other factors besides the 80 percent discount for  searching 
        
        the Beilstein Database had contributed to that decision.   Seven-
        
        teen people pointed both to a need for savings to avoid canceling 
        
        primary journals and a perception of a very high cost per use  as 
        
        factors leading to the cancellation decision.  Other factors were 

        not  considered important by many of the respondents.  Only  four 
        
        cited  the availability of Beilstein at an  academic  institution 
        
        within a one-hour drive as a factor, and only one had gone so far 
        
        as  to  establish a borrowing arrangement with  another  library.  
        
        The  sharing of such an expensive tool as Beilstein is  typically 
        
        done  by allowing people from outside the holding institution  to 
        
        come  for on-site usage, a practice described by  seven  respond-
        
        ents.  It was somewhat surprising to find that three institutions 
        
        were  actually required by the administration of the  library  to 
        
        cut Beilstein.  Among other factors cited for canceling Beilstein 
        
        was the long delay in publication of the data.
        
             Eight  of the respondents stated that their institution  had 
        
        purchased  the Beilstein Centennial Index covering the  Hauptwerk 
        
        and supplements  EI-EIV (literature through 1959) in a single set 
        
        of Chemical Name and Molecular Formula Indexes.  Of those who did 
        
        not  purchase  the  Centennial Index, cost  was  the  over-riding 
        
        factor,  although some cited the duplication of  existing  volume 
        
        indexes, and space considerations.  There was also a feeling that 
        
        the set does not get enough use to justify the expense of the new 
        
        index.  One confident librarian noted that "If you have a librar-
        
        ian that knows how to locate compounds, the index is a luxury."
        
             Several years ago the Beilstein Institute introduced an  IBM 
        
        PC computer-based product to assist in finding the location of  a 
        
        compound in the printed Beilstein.  That is SANDRA, a tool  which 

        allows the user to draw the structure with a mouse.  In spite  of 
        
        the  existence of such a program, only eight respondents feel  it 
        
        has increased the use of the printed Beilstein Handbook at  their 
        
        institutions.   One person noted, "...despite my efforts to  pro-
        
        mote it, few people ever use SANDRA."  Perhaps some of the  prob-
        
        lem lies in the fact that SANDRA is only available for an IBM  PC 
        
        or compatible computer.  Fourteen people listed the Macintosh  as 
        
        the computer they use most, with two of those also using IBM  PCs 
        
        or  compatibles.   Twenty one respondents use  IBMs  exclusively.  
        
        Almost all (33 of 35) have their computers equipped with suitable 
        
        communications devices to search online.
        
             The  decline in the use of the Beilstein Handbook was  noted 
        
        by twenty six of thirty two respondents, with only five believing 
        
        that its use has not decreased in the last 20 years.  One  person 
        
        stated, "I think the use of Beilstein has declined in the past 20 
        
        years  as organic chemists have not brought along their  students 
        
        as  they were taught to use and rely on Beilstein.  This  product 
        
        has also suffered from the onslaught of online products/databases 
        
        that  have spoiled chemists into an instant fix  for  information 
        
        which  differs  from the slow,  methodical  print-based  research 
        
        performed by chemists only 10 years ago."
        
             It  is  possible that the existence of central  science  li-
        
        braries  (or  the  inclusion of science materials  in  a  general 
        
        library serving all disciplines) may have also contributed to the 

        decline  in the use of Beilstein.  Nine of thirty three  respond-
        
        ents indicated the library they normally use is in another build-
        
        ing  than the one in which they work.  But it is likely that  the 
        
        disuse of Beilstein could be linked to another factor not  really 
        
        examined in this study--the relative decline in  foreign-language 
        
        ability among scientists and librarians whose native language  is 
        
        English.  
        
             There is also relatively less emphasis presently placed upon 
        
        formal  instruction  in the chemical literature  by  professional 
        
        organizations  such as the American Chemical Society compared  to 
        
        several  decades ago.  However, efforts are being made  to  teach 
        
        people how to use the printe Beilstein.
        
             Although nine people responded that Beilstein Handbook users 
        
        at  their institutions are self-taught, there is clearly  an  at-
        
        tempt being made at most institutions to teach its use in a  more 
        
        formal  manner.  People are usually taking advantage of the  free 
        
        printed  material available from the publisher (33  respondents), 
        
        but they also often produce their own materials to supplement the 
        
        publisher's  materials  (19 respondents).  A few (N=5)  even  use 
        
        audiovisual materials.
        
             There  is considerably less training being offered  to  end-
        
        users  for the Beilstein Database.  Thirteen librarians and  five 
        
        chemists  reported that they had the responsibility for  offering 
        
        such  training at their institutions, but an additional  thirteen 
        
        stated  that no one has this responsibility.  In response to  the 
        
        question  whether usage of the Beilstein Database  had  increased 
        
        significantly  after a training session or workshop was  offered, 
        
        only  three responded affirmatively.  Six said "no," another  six 
        
        said  they  did not know, and seven stated that there  had  never 
        
        been a training session.
        
        
        
        III. User Comments.
        
        
        
             A  number of comments from Beilstein users were culled  from 
        
        both  CHMINF-L and this survey in order to lend a further  dimen-
        
        sion to this study.  Ann Bolek of the University of Akron  stated 
        
        on  CHMINF-L, 
        
        I  think that online searching of Beilstein on STN is very  inex-
        pensive,  if you know what you are doing.  I am  usually  looking 
        for  one  property for one compound.  I  crossover  the  Registry 
        Number from the Registry file to the Beilstein file, display  the 
        fields available (D FA) and then display the information for  the 
        property  I want if it is in the fields available.  My  Beilstein 
        searches usually cost between $2 and $3, which is less than  most 
        of  my  Chemical Abstracts searches, even with an  Academic  Dis-
        count.(5)
        
             An anonymous CHMINF-L subscriber stated:
        
        I am a chemist, who does chemistry, and I often feel a little out 
        of place in this group which seems to be mostly chemists or  non-
        chemists who do library things instead of chemistry, but I'd like 
        to say something from a chemist's point of view.  Beilstein is  a 
        handbook, and it contains data.  It also contains reactions,  and 
        it contains references, but the thing Beilstein has that  nothing 
        else  has is data.  If you need a melting point, or an nmr  spec-
        trum,  or an ionization constant of an organic compound,  there's 
        no  quicker  place to find it than Beilstein.   If  Beilstein  is 
        infrequently used, it isn't because it's not useful, but  because 
        chemists  and the librarians who help them don't know how to  use 
        it.  In the last two months there have been a number of questions 
        posted here, for example, how to make chloroform from carbon tet, 
        where  the Xray crystal structure of a phosphonic acid  could  be 
        found,  what the ionization constant of an acid is,  and  several 
        others,  and  the answer was the same, it's in Beilstein.   I  am 
        fortunate  enough  to have instant access to  part  of  Beilstein 
        (Hauptwerk through E-II), and not too inconvenient access to  the 
        whole  thing,  and I use it at least two or three  times  a  day, 
        often  more.  It's no more difficult to use Beilstein  than  thin 
        layer  chromatography; all it takes is a little effort  to  learn 
        how, and like tlc, the more you use it the easier it gets and the 
        more  you realize what it can do for you.  The cost  of  printing 
        one  copy of one subvolume of Beilstein must be about  $50.  It's 
        the    cost    of   producing   it    (abstracters,    computers, 
        subscriptions--the  Beilstein Institute can't cancel  Phosphorus, 
        Sulfur,  and  Silicon  when it goes up to $7400)  that  makes  it 
        expensive,  and that's a constant.  Each time a subscription  [to 
        Beilstein] is canceled the constant has to be divided by a small-
        er  number.  People who complain about paying $30,000  can  thank 
        those who canceled at $20,000.  Books are usually out of date  by 
        the  time  they're cataloged, journal articles are  available  on 
        loan, but NOTHING can take the place of Beilstein.(6)
        
        These  sentiments  were  echoed by a respondent  to  the  present 
        
        survey:
        
        There  is  no  substitute for Beilstein.   The  justification  of 
        expense for dropping the subscription doesn't quite wash--Science 
        Citation  Index is $15,000 for the CD-ROM, Beilstein is  $30,000.  
        In 5 years SCI will be worth about zero; Beilstein will still  be 
        as useful as ever.  It is true that Beilstein is not used as much 
        as it should be, because the present generation of organic  chem-
        ists  don't appreciate its utility.  Part of the problem is  that 
        the librarians don't know how to use it and don't appreciate  its 
        utility, and don't suggest its use.  STN's Numeriguide and CASRE-
        ACT  databases are beginning to do the same thing, but there's  a 
        tremendous gap between E-V and 1992 when they start.(7)
        
        
                             Summary and Conclusions
        
             Some academic librarians have chosen to sacrifice  subscrip-
        
        tions  to the printed Beilstein Handbook of Organic Chemistry  in 
        
        order to reallocate the money for other purposes.  Since far less 

        money is typically spent on searching the Beilstein Database than 
        
        was paid for the printed Beilstein, money can be diverted to  the 
        
        maintenance of primary journal subscriptions.  There is not a lot 
        
        of  searching  of the Beilstein Database being done  at  academic 
        
        institutions, despite the existence of an 80 percent discount for 
        
        those institutions which do maintain subscriptions to  Beilstein.  
        
        Structure  searching capability is seen by most searchers  as  an 
        
        important  feature  of  the database.   Relatively  few  academic 
        
        institutions  have subscribed to the Beilstein Current Facts  CD-
        
        ROM product.  Those that have Current Facts report that it  leads 
        
        to  increased use of the printed Beilstein, something an  earlier 
        
        computerized  product,  SANDRA, has not been very  successful  in 
        
        achieving.  It was a bit of a surprise to find that Current Facts 
        
        does not seem to increase searching of the Beilstein Database.
        
             A minority of academic librarians remain faithful  subscrib-
        
        ers  to  the printed Beilstein.  However, there is  a  perception 
        
        among some chemists that neither librarians nor their  colleagues 
        
        have either an appreciation for Beilstein or an understanding  of 
        
        how to use it.  It remains to be seen whether that same  attitude 
        
        will be associated with the Beilstein Database.
        


                              REFERENCES AND NOTES
        
        
        
        (1) See, for example:
        
        Chrzastowski,  T.E.;  Blobaum, P.M.; Welshmer,  M.A.  A  Cost/Use 
        
        Analysis  of Beilstein's Handbuch der Organischen Chemie  at  Two 
        
        Academic Chemistry Libraries.  Ser. Libr. 1991, 20(4), 73-84.
        
        
        
        Knee,  M. Beilstein and Gmelin: Keep or Cancel. Libr. Acq.  Prac. 
        
        Theor. 1992, 16(4), 443-450.
        
        
        
        (2)  Luckenbach,  R.  Beilstein Centennial  Index--180  Years  of 
        
        Organic Chemistry (and 1.5 Million Compounds) at Your Fingertips. 
        
        Abstr.  Pap. Amer. Chem. Soc. 1993, 205, Part 1, CINF  24.   Com-
        
        ments by Dr. Luckenbach to a question posed from the audience.
        

        (3) Chrzastowski, Op. Cit., 82.


        (4)  Luckenbach, R. Beilstein at Academic Rates. CHMINF-L,  Chem. 
        
        Inf. Sources Disc. List February 4, 1993.
        

        (5) Bolek, A. "Re: Beilstein at Academic Rates." CHMINF-L (Febru-
        
        ary 3, 1993)
        
        
        
        (6) CHMINF-L: listserv@iubvm.ucs.indiana.edu
        
        
        (7) Personal Communication