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Start Over You searched for: Subjects Libraries, Medical Remove constraint Subjects: Libraries, Medical Subjects United States Remove constraint Subjects: United States Dates by Range 1950-1999 Remove constraint Dates by Range: 1950-1999

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

48. 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