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Subjects
Decontamination
1
Decontamination of food
1
Decontamination of persons
1
Decontamination of technical equipment
1
Democracy
1
Demonstrations
2
Dialectical materialism
1
Diplomatic relations
1
Diplomats
2
Dissenters
2
Dissident movement
2
Division of labor
1
Docks
1
Economic assistance, Soviet
1
Education
2
Elections
1
Electric power
1
Electric power-plants
1
Engineering rescue services
2
Environmental protection
1