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Subjects
Civil defense
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3
Food storage
2
Evacuation
1
Gas mask
1
Imperialist aggression
1
Improvised shelters
1
Prevention
1
Public information work
1
Radio warning
1
Reception center for evacuees
1
Second World War
1
Training coordination
1
Warning
1
Warsaw Pact Treaty
1
Water supply
1
Weapons of mass destruction
1