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Subjects
World War II
9
Civil defense
6
History
5
Hungarian Soviet Republic
4
History of Hungary
3
Imperialist aggression
3
Military
3
Warsaw Pact
3
Chemical attack
2
First World War
2
Hungarian revolution of 1956
2
Poison gases
2
Second World War
2
Vietnam war
2
Agriculture
1
Air defense
1
Air raid warning
1
Antichemical-protection service
1
Bikini atoll nuclear tests
1
Chemical decontamination
1