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1. National Library of Medicine classification: a scheme for the shelf arrangement of books in the field of medicine and its related sciences

2. National Library of Medicine classification: a scheme for the shelf arrangement of library materials in the field of medicine and its related sciences

4. National Library of Medicine classification: a scheme for the shelf arrangement of library materials in the field of medicine and its related sciences

5. Arcana alphanumerica, or, The secrets of HMD call numbers revealed : being a description of call numbers used for printed materials in the History of Medicine Division, with an explanation of their meaning, usage, and derivation