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Subjects
Civil defense
6
Decontamination of food
[remove]
6
Chemical decontamination
2
Decontamination
2
Food storage
2
Agriculture
1
Air defense
1
Air raid warning
1
Animal and plant protection reconnaissance
1
Bikini atoll nuclear tests
1
Biological warfare
1
Decontamination of land
1
Decontamination of technical equipment
1
Epidemic
1
First World War
1
Gyöngyös
1
Imperialist aggression
1
Korean war
1
Laboratory
1
Latency period
1