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Start Over You searched for: Subjects National Library of Medicine (U.S.). History of Medicine Division. Remove constraint Subjects: National Library of Medicine (U.S.). History of Medicine Division. Dates by Range 1950-1999 Remove constraint Dates by Range: 1950-1999

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7. 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