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Library of Congress Online Catalogs

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library congress online catalog catalogs research bibliographic records MARC search browse keyword books serials maps music sound recordings prints photographs microforms computer files maps

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The Library of Congress collections include over 110 million items in a variety of formats and languages. The catalog information for many of these items has appeared in a number of traditional card catalogs located in the Library. Much of the information in these catalogs is also searchable over the Internet. This page links to the two methods for search the main Library of Congress Online Catalog and to several specialized catalogs for prints and photographs (PPOC), for sound recordings (SONIC) and a Z39.50 gateway to the main catalog data.

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