History 18,870 Politics and government 5,928 Histoire 3,873 Description and travel 3,349 Social conditions 2,851 Social life and customs 2,807 Antiquities 1,506 Máis ... Race relations 1,393 Economic conditions 1,380 Civilization 1,300 Manners and customs 1,237 Foreign relations 1,185 Politique et gouvernement 1,185 African Americans 1,161 Travel 1,036 Frontier and pioneer life 1,031 Indians of South America 916 Ethnic relations 820 Indians of Mexico 811 Conditions sociales 728 Indians of North America 656 Descriptions et voyages 647 Relations 614 Mayas 572 International relations 550 Historic buildings 529 Social aspects 506 Emigration and immigration 492 Jews 492 Mœurs et coutumes 481 menos ...