Description and travel Travel 1,770 History 1,464 Social life and customs 830 Manners and customs 550 Natural history 277 Antiquities 229 更多 ... Politics and government 211 Indians of North America 200 Social conditions 186 Discovery and exploration 163 Voyages and travels 158 History and criticism 157 Civilization 141 Art 132 Economic conditions 131 Homes and haunts 119 Discoveries in geography 114 In literature 105 Travelers 92 Geography 85 Missions 76 Frontier and pioneer life 74 History, Local 73 Architecture 72 British 63 Slavery 61 Authors, American 57 Geology 56 Americans 50 少 ...