The world's largest shelflist, available complete or in selected subject areas, has become an essential tool for librarians--from large academic to smaller specialized libraries. The LC Shelflist is an unmatched resource for collection development and provides a convenient, time-saving means for identifying a vast universe of titles available in any subject. Also featured are many pre-1968 and non-Roman titles not in ordinary bibliographic sources.

Catalogers use the LC Shelflist and its complete bibliographic information to simplify the task of cataloging and as a current source for verification of headings and classifications. It is also valuable for libraries using Dewey classification.

Interlibrary loan requests can be met with greater efficiency using the LC Shelflist, since researchers can turn to the list as a starting point to identify titles they need. By scanning a class range within the list, librarians can also compile a bibliography for a faculty member or student on any topic requested much more rapidly.

Special libraries can purchase the LC Shelflist in any of the 46 separate subject headings segments available. The collection is updated through 1979.

Subject Index and Number Index to the MARC Database The use and cost-effectiveness of both your computer cataloging system and the LC Shelflist can be expanded by adding the reference capability of two valuable indexes:

• Cumulative Subject Index to the MARC Data Base, 1968-1978 is a 14-volume set containing more than 1.6 million subject entries that refer to 640,000 nonfiction MARC titles. Some 140,000 primary subject headings and 260,000 non-primary subject headings are listed alphabetically, with an average of four entries per heading. All LC classification numbers for each primary subject heading are listed. These numbers can be looked up in LC class order on your microfiche edition and can then be viewed or printed as LC cards for any of the MARC or non-MARC entries.
• The Library of Congress Classification Number Index to the MARC Data Base, 1968-1978 contains a cumulative listing of all LC class numbers assigned to MARC records. This eight-volume set can be used as a convenient outline of the entire contents of the LC Shelflist on microfiche. These indexes are a unique source of all the subject headings that LC catalogers have assigned to works under each LC class number in the MARC database.