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Subjects
- United States23
- Weapons11
- Military Personnel7
- Aircraft6
- Equipment and Supplies6
- Military Personnel -- education5
- World War II5
- Equipment Design3
- Telescopes3
- Ventilation3
- Adaptation, Physiological -- physiology1
- Air Pollution, Indoor1
- Aircraft -- instrumentation1
- Alaska1
- Aluminum -- analysis1
- Behavioral Research1
- Body Constitution1
- Body Weights and Measures1
- Carbon Monoxide Poisoning1
- Cold Climate1