History 89 851 Politics and government 31 801 Indians of North America 24 907 Histoire 23 321 African Americans 23 048 Foreign relations 18 184 Social conditions 12 587 lisää ... Race relations 11 995 Slavery 10 652 Presidents 10 534 Antiquities 9 269 Social life and customs 9 025 Politique et gouvernement 9 021 Diplomatic relations 7 007 Civilization 6 562 HISTORY 6 425 Description and travel 6 226 Civil rights 5 957 Noirs américains 5 890 International relations 5 701 Campaigns 5 222 Relations extérieures 5 183 General 5 133 Discovery and exploration 4 306 Government relations 4 198 Relations raciales 4 093 Regimental histories 3 983 Economic conditions 3 949 Biography 3 931 Conditions sociales 3 852 vähemmän ...