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Subject
- Civil defense28
- Disaster relief4
- Study and teaching3
- World War, 1939-19453
- Aeronautics, Military1
- Air defenses1
- Air raid shelters1
- Amateur radio stations1
- Atomic bomb1
- Auxiliary police1
- Bombing, Aerial1
- Camouflage (Military science)1
- Civil defense warning systems1
- Civilian defense1
- Community and school1
- Design1
- Disasters1
- Emergency communication systems1
- Equipment and supplies1
- Evacuation of civilians1