Description and travel Travel 29,573 History 18,792 Social life and customs 9,495 Natural history 2,937 Politics and government 2,844 Manners and customs 2,404 more ... Social conditions 2,340 Antiquities 2,249 Civilization 2,029 Indians of North America 1,979 Economic conditions 1,851 Discovery and exploration 1,755 Descriptions et voyages 1,699 Homes and haunts 1,489 Voyages and travels 1,431 History and criticism 1,174 Art 1,170 Views 1,110 Missions 1,039 Journeys 1,010 Frontier and pioneer life 970 Travelers 937 Foreign relations 929 Geography 904 Architecture 891 Indians of South America 802 In literature 798 Ethnology 773 Overland journeys to the Pacific 695 less ...