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Subjects
- United States119
- World War I113
- Hygiene61
- Military Medicine41
- France36
- Hospitals, Military36
- Military Personnel34
- Medicine29
- New York26
- Physicians23
- Sanitation23
- Brazil22
- Physiological Phenomena21
- Sex Education21
- Sexual Behavior21
- New York City18
- Public Health17
- Sexually Transmitted Diseases17
- Relief Work16
- Chemical Phenomena15
