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Subjects
Civil defense
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3
Civil defense at factories
1
Civil defense exercise
1
Civil defense obligations
1
Evacuation
1
Imperialist aggression
1
Nuclear weapon
1
Peaceful application of nuclear energy
1
Reception of evacuees
1
Second World War
1
Switch to war production
1
Traffic control
1
Warsaw Pact Treaty
1
Water supply
1
Weapons of mass destruction
1