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Subjects
Civil defense
9
Warsaw Pact
4
Agriculture
3
Economy
3
Housing
3
Industry
3
Radiation detection
3
Antichemical-protection service
2
Chemical decontamination
2
Civil defense at factories
2
Contamination area
2
Council for Mutual Economic Assistance
2
Education
2
History
2
Leisure
2
Military
2
North Atlantic Treaty Organization
2
Personal antichemical-protection gear
2
Radio warning
2
Council for Mutual Economic
1