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Subjects
Transport and Communications
2
Warsaw Pact
2
Women
2
Youth
2
Agricultural education
1
Agriculture, Cooperative
1
AgricultureAgriculture
1
Agronomy
1
Animal and plant protection reconnaissance
1
Charity
1
Civil defense exercise
1
Communism
1
Construction/Civil Engineering
1
Cooperation
1
Decontamination of animals
1
Decontamination of land
1
Decontamination of water
1
Developing countries
1
Domestic animals
1
Economic history
1