History 75 Politics and government 70 Economic conditions 23 Social conditions 20 Civilization 18 World politics 16 Foreign relations 14 more ... Periodicals 12 World War, 1939-1945 12 Political activity 11 Histoire 8 African Americans 7 Economic history 7 Emigration and immigration 7 Jews 6 Slovaks 6 Communism 5 Minorities 5 Social life and customs 5 Civil rights 4 Civilian relief 4 Cold War 4 Description and travel 4 Hungarians 4 Polish people 4 Politique et gouvernement 4 Popular culture 4 Race relations 4 Relations extérieures 4 Social aspects 4 Societies, etc 4 Activité politique 3 Civilian war relief 3 Commerce 3 Conditions économiques 3 Culture populaire 3 Descriptions et voyages 3 Dissenters 3 Economic aspects 3 Education 3 less ...