An authority record is a tool used by librarians to establish forms of names (for persons, places, meetings and organizations), titles and subjects used on bibliographic records. Authority records enable librarians to provide uniform access to materials in library catalogs and to provide clear identification of authors and subject headings. Authority records also provide cross references to lead users to the headings used in library catalogs. The Library of Congress database contains more than 5.5 million authority records. Through the Library of Congress Authorities service, users have access to these authority records, including 3.8 million personal, 900,000 corporate, 120,000 meeting, 90,000 geographic name authority records; 265,000 subject authority records; 350,000 series and uniform title authority records; and 340,000 name/title authority records.
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