Librarians and Archivists
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Library of Congress Online Catalog
Search and browse more than 14 million bibliographic records for materials in the Library's diverse collections

Library of Congress Authorities
Browse and view authority headings for subjects, names, titles and name/title combinations.

Prints/Photographs Online Catalog
Search and view digital images representing a rich cross-section of still pictures held by the Library. [PPOC]

Sound Online Inventory & Catalog
Search a catalog of 78s, 45s, copyright cassettes and broadcast and archival recordings. [SONIC]

Z39.50 Gateway to Library Catalogs
Gateway access to the Library of Congress catalog as well as other libraries across the globe.

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