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- Libraries, Medical275
- National Library of Medicine (U.S.)264
- Physicians251
- Anniversaries and Special Events235
- National Institutes of Health (U.S.)189
- Fredrickson, Donald S.179
- Facility Design and Construction164
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- Black or African American136
- Clothing104
- Lister Hill National Center for Biomedical Communications.98
- Administrative Personnel88
- National Library of Medicine (U.S.). Reference Services Division84
- Librarians78
- Shannon, James A. (James Augustine), 1904-1994.78
- Acquired Immunodeficiency Syndrome -- prevention & control70
- Library Materials68
- Veterans64
- United States59
- Military Personnel58