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Subjects
- African Americans[remove]497
- United States76
- Nurse Midwives71
- Nurses51
- Humans40
- National Library of Medicine (U.S.). Reference Services Division.36
- Hispanic Americans35
- European Continental Ancestry Group32
- Acquired Immunodeficiency Syndrome -- prevention & control31
- Physicians24
- Child23
- Microfilming21
- Libraries, Medical19
- American Civil War18
- Library Materials18
- Minority Groups17
- Asian Americans16
- Infant16
- Adolescent15
- Condoms15