1. National Library of Medicine classification: a scheme for the shelf arrangement of library materials in the field of medicine and its related sciences Author(s): National Library of Medicine (U.S.) Publication: Bethesda, Md. : U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, National Library of Medicine ; Washington, DC : For sale by the Supt. of Docs., U.S. G.P.O., 1999 Subject(s): Book ClassificationMedicineLibrary Materials -- classificationLibraries, MedicalUnited States