[USE OF MEDICAL LIBRARIES AND THE TRACKING DOWN OF LITERATURE].
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A fifty-year review of the history of health sciences librarianship, as reflected in four editions of the Handbook of Medical Library Practice and its successor, Current Practice in Health Sciences Librarianship, illustrates the significant changes our profession has undergone. Publication in 1943 of the first edition of the Handbook marked an important milestone in the development of the Medical Library Association, as a group of dedicated volunteers documented standard practice and recorded useful data. Administration of health sciences libraries has moved from art to science. Responsibility for the development of collections is now the sole purview of professional librarians. Automation and bibliographic standards have revolutionized the methods for controlling and providing access to information resources. And, the means by which assistance is provided to library users, through the use of computer and telecommunications technology, has changed dramatically.
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In this article the authors present their analysis of the online search patterns within user searching sessions of the National Library of Medicine ELHILL system and examine the user search patterns on the CATLINE database. In addition to the CATLINE analysis, a comparison is made using data previously analyzed on the MEDLINE database for the same time period, thus offering an opportunity to compare the performance parameters of different databases within the same information system. Data collection covers eight weeks and includes 441,282 transactions and over 11,067 user sessions, which accounted for 1680 hours of system usage. The descriptive analysis contained in this report can assists system design activities, while the predictive power of the transaction log analysis methodology may assists the development of real-time aids.
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