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Subjects
Christianity
2
Civil service
2
Communication
2
Communist countries
2
Cosmology
2
Defense information, Classified
2
East-West trade
2
Education
2
Elections
2
Elite (Social sciences)
2
Emigration and immigration
2
Engineering
2
English language
2
Exiles
2
Festival
2
Forced labor
2
Freedom of association
2
German reunification question (1949-1990)
2
Government executives
2
Government information
2