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Subjects
Civil defense
11
Contamination area
2
Engineering rescue services
2
Food storage
2
Imperialist aggression
2
NBC (nuclear, biological, chemical) special services
2
Public information work
2
Second World War
2
Transportation
2
Warning
2
Water supply
2
Agriculture
1
Air defense
1
Air raid warning
1
Antichemical-protection service
1
Assembly area
1
Bikini atoll nuclear tests
1
Biography
1
Central economic planning
1
Civil defense command
1