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Bibliographic Record Distribution

Question: Does NLM distribute its bibliographic records and how do I subscribe?
  • NLM bibliographic records for serials, monographs, audiovisuals, computer software, electronic resources and other materials are available in MARC 21 communications format and in XML format on a subscription basis

  • NLM offers three MARC 21 bibliographic products: Catfile, CatfilePlus, and Serfile

  • For details, see Leasing Data from the National Library of Medicine at

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