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Subjects
Civil defense
3
Warning
[remove]
3
Evacuation
2
Air defense
1
Air raid warning
1
Bikini atoll nuclear tests
1
Civil defense exercise
1
Decontamination of food
1
Energy supply
1
Evacuation planning
1
First World War
1
Food storage
1
Gas mask
1
Imperialist aggression
1
Korean war
1
Natural disaster
1
Prevention
1
Public information work
1
Reception of evacuees
1
Second World War
1