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Subjects
Civil defense
3
Civil defense at factories
[remove]
3
Air-raid service
1
Black-out services
1
Civil defense command
1
Civil defense exercise
1
Civil defense obligations
1
Evacuation
1
Evacuation and refugee shelter services
1
Food storage
1
Mobilization
1
Prevention
1
Public information work
1
Radio warning
1
Rapid harvest
1
Reception of evacuees
1
Switch to war production
1
Traffic control
1
War production plants
1
Water supply
1