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Subjects
- United States243
- Libraries, Medical210
- Medicine112
- National Library of Medicine (U.S.)87
- Periodicals as Topic32
- Abstracting and Indexing as Topic31
- Military Medicine28
- Exhibits as Topic20
- History of Medicine20
- MEDLARS20
- Army Medical Library (U.S.)18
- Information Systems16
- Library Services15
- Library of the Surgeon-General's Office (U.S.)15
- Physicians15
- Book Classification14
- Catalogs, Library13
- Book Selection11
- Information Services11
- Armed Forces Medical Library (U.S.)10