West (U.S.) Description and travel 375 Frontier and pioneer life 374 West (U.S.) History 362 West (U.S.) 257 Indians of North America 124 Geology 102 Overland journeys to the Pacific 102 Water-supply 75 Geology, Stratigraphic 70 West (U.S.) Discovery and exploration 64 Indians of North America Wars 62 Paleontology 53 Cowboys 52 West (U.S.) Social life and customs 52 History 46 Water rights 46 West (U.S.) In literature 45 Public lands 44 Water resources development 42 Public lands Management 41 United States Discovery and exploration 39 Crime 37 Fur trade 37 Uranium ores 37 Mines and mineral resources 35 Outlaws 35 Pioneers 33 Cattle trade 32 Trails 32 Military life 28 Rocky Mountains 26 United States Territorial expansion 26 Wilderness areas 26 American literature History and criticism 24 Forest management 24 Ranch life 24 United States History 24 Explorers 23 Indians of North America History 22 Petroleum 22 California Description and travel 21 Geology, Structural 21 Water quality management 21 Climatic changes 20 Environmental policy 20 Indians of North America Claims 20 Oregon National Historic Trail 20 West (U.S.) Economic conditions 20 Range management 19 Travel 19 Water resources development Law and legislation 19 Women 19 Women pioneers 19 Hunting 18 Railroads 18 Western stories History and criticism 18 Conservation of natural resources 17 Droughts 17 Groundwater 17 Railroads History 17 Rangelands 17 Art, American 16 Authors, American 16 Hydrology 16 Water Law and legislation 16 West (U.S.) Civilization 16 West (U.S.) Environmental conditions 16 West (U.S.) Politics and government 16 American literature 15 Gold mines and mining 15 Historic sites 15 Natural history 15 Ammonoidea 14 Forests and forestry 14 Land use 14 Latter Day Saints 14 Postal service 14 Santa Fe National Historic Trail 14 Water conservation 14 Water quality 14 Wildlife conservation 14 Women History 14 American bison 13 Ecosystem management 13 United States 13 Water resources development History 13 Watershed management 13 West (U.S.) Historiography 13 Artists 12 California Gold discoveries 12 Criticism and interpretation 12 Endangered species 12 Land use Government policy 12 Landscape protection 12 National parks and reserves 12 Range policy 12 West (U.S.) Social conditions 12 African American troops 11 Birds 11 Reclamation of land 11