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Cataloging

Licensing NLM Bibliographic Products

NLM bibliographic records are available in either the MARC 21 communications format or in XML format on a subscription basis. NLM currently offers three MARC 21 bibliographic products: Catfile, CatfilePlus, and Serfile. CatfilePlus and Serfile are also available in XML. See Leasing Data from the National Library of Medicine or contact custserv@nlm.nih.gov for more information.


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