History 18,229 Politics and government 4,812 Description and travel 4,498 Social life and customs 3,039 Histoire 3,035 Social conditions 2,734 Race relations 1,466 更多 ... Antiquities 1,442 Frontier and pioneer life 1,419 African Americans 1,320 Travel 1,307 Civilization 1,271 Economic conditions 1,268 Foreign relations 1,260 Politique et gouvernement 971 Indians of North America 965 Descriptions et voyages 868 Indians of South America 795 Ethnic relations 727 Indians of Mexico 723 Manners and customs 681 Discovery and exploration 636 Mayas 617 Relations 591 Social aspects 521 Jews 475 Mœurs et coutumes 452 Religion 440 Sources 434 Colonies 431 少 ...