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

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

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

25. The Lister Hill National Center for Biomedical Communications: report to Congress, May 1974