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Subjects
- USSR1
- Ultrasonic Therapy2
- Ultrasonic Waves -- adverse effects4
- Ultraviolet Rays1
- Unconsciousness1
- United States755
- United States -- epidemiology10
- United States -- ethnology2
- United States Government Agencies16
- United States Government Agencies -- legislation & jurisprudence1
- United States Government Agencies -- organization & administration11
- United States Marine Hospital at Boston.1
- United States Maritime Service.1
- United States Military Academy. Medical Department1
- United States Naval Hospital (Mare Island, Calif.). Artificial Limb Department1
- United States.2
- United States. Air Force1
- United States. Air Force Medical Service1
- United States. Army17
- United States. Army Dental School1
