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Subjects
Air defense
1
Air raid warning
1
Arms race
1
Bikini atoll nuclear tests
1
Chemical attack
1
Chemical weapon
1
Civil defense
6
Civil defense at factories
1
Civil defense exercise
2
Civil defense obligations
1
Construction of shelters
1
Contamination area
1
Damage zones
2
Decontamination of food
1
Education of youth
1
Escape route
1
First World War
2
Imperialist aggression
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6
Improvised shelters
1
Korean war
1