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Subjects
- USSR8
- Ultrasonic Therapy2
- Ultrasonic Waves -- adverse effects4
- Ultraviolet Rays4
- Union Health Center (New York, N. Y.).1
- United Kingdom1
- United Nations1
- United States228
- United States -- epidemiology1
- United States Department of Veterans Affairs1
- United States Dept. of Health and Human Services1
- United States Food and Drug Administration3
- United States Government Agencies7
- United States Government Agencies -- history1
- United States Government Agencies -- organization & administration5
- United States Health Resources and Services Administration7
- United States Military Academy. Medical Department.1
- United States National Aeronautics and Space Administration1
- United States Naval Hospital (Mare Island, Calif.). Artificial Limb Department.1
- United States Public Health Service45