History Histoire 17,543 Politics and government 15,718 Social life and customs 7,058 Social conditions 6,109 Description and travel 5,630 HISTORY 3,965 more ... Race relations 3,370 Frontier and pioneer life 3,209 Sources 3,136 Economic conditions 3,006 Indians of South America 2,849 Manners and customs 2,818 African Americans 2,779 Antiquities 2,758 Civilization 2,758 Foreign relations 2,452 General 2,423 Indians of North America 2,250 Travel 2,102 State & Local 2,031 Indians of Mexico 2,014 Politique et gouvernement 1,925 Ethnic relations 1,916 Emigration and immigration 1,813 Colonies 1,769 Biography 1,667 Immigrants 1,633 Discovery and exploration 1,552 Historiography 1,434 less ...