Sources History 614 Histoire 138 Politics and government 104 Foreign relations 87 African Americans 73 Indians of North America 48 Máis ... Slavery 32 Politique et gouvernement 31 Quelle 24 Noirs américains 23 Civilization 21 Government relations 19 Race relations 19 Social conditions 19 Presidents 18 Civil rights 17 Diplomatic relations 17 Personal narratives 17 Relations extérieures 16 Social life and customs 16 Colonies 15 History, Military 15 Bibliography 14 Causes 14 Correspondence 14 Discovery and exploration 13 Biography 12 Watergate Affair, 1972-1974 12 Slaves 11 menos ...