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The Library of Congress announced today its third release of records in its online catalog for free bulk download for research and discovery. The release supports the Library’s effort to continuously expand open access to its vast collections.

This MARC (Machine Readable Cataloging Records) release surpasses previous releases and adds more than 200,000 new records to the existing 25 million record database.

Releases of MARC data uniquely exhibit the Library’s mission. They enable researchers to engage with the unparalleled and rich source metadata at the Library, inspire discovery of Library collections and provide resources to inform future discovery within the Library and data communities.

The data covers a wide range of Library items including books, serials, computer files, manuscripts, cartographic materials, music, sound recordings and visual materials.  Each record provides standardized information about an item, including its title, author, publication date, subject(s), genre, related names, summary and other notes.

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