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Subjects
- United States20
- World War II[remove]20
- Military Personnel18
- Cold Temperature10
- Protective Clothing9
- Motor Vehicles5
- Adaptation, Physiological4
- Air Pollutants, Occupational4
- Cold Climate3
- Ventilation3
- Weapons3
- Acclimatization2
- Food Storage -- instrumentation2
- Hot Temperature2
- Arctic Regions1
- Climate1
- Clothing1
- Desert Climate1
- Firearms1
- Rain1