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Subjects
History
6
Agriculture
5
Biography
5
Industry
4
Civil defense
3
Military
3
Political tale
2
Scientific research
2
Space research
2
Antichemical-protection service
1
Arms race
1
Arts
1
Central economic planning
1
Civil defense command
1
Civil defense exercise
1
Consumer goods
1
Council for Mutual Economic Assistance
1
Damage zones
1
Education
1
Engineering rescue services
1