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- United States[remove]201
- Plants, Medicinal17
- Education, Medical15
- Military Personnel14
- Medicine12
- Military Personnel -- legislation & jurisprudence12
- Materia Medica11
- Phytotherapy10
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- Dispensatories8
- Europe6
- Government Regulation6
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- Naval Medicine6
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- Prisons -- organization & administration6
- Climate5
- Hospitals, Military5
- Hospitals, Military -- economics5
- United States. Navy.5