- Snails -- parasitology2
- Social Welfare2
- Socioeconomic Factors2
- Sterilization2
- Students, Medical2
- Surgeons2
- Syphilis -- prevention & control2
- United States. Army.2
- United States. Army. Evacuation Hospital, 15th.2
- United States. Army. Evacuation Hospital, 2nd.2
- United States. Army. Evacuation Hospital, 56th.2
- United States. Army. Field Hospital, 99th.2
- United States. Army. General Hospital, 100th.2
- United States. Army. General Hospital, 108th.2
- United States. Army. General Hospital, 39th.2
- United States. Army. General Hospital, 42nd.2
- United States. Army. General Hospital, 58th.2
- United States. Army. General Hospital, 67th.2
- United States. Army. General Hospital, 6th.2
- United States. Army. General Hospital, 95th.2