Indians of North America 1,130 Geology 972 History 953 Antiquities 563 Maps 458 Mines and mineral resources 382 Law and legislation 319 Description and travel 317 Environmental aspects 274 Groundwater 268 Hopi Indians 253 Navajo Indians 246 Land titles 234 Frontier and pioneer life 222 Public lands 222 National parks and reserves 216 Registration and transfer 206 Apache Indians 194 Geology, Stratigraphic 185 Politics and government 183 Roads 181 Land use, Rural 172 Water rights 168 Legal status, laws, etc 167 Water-supply 167 Flood insurance 163 Forest reserves 163 Management 162 Social life and customs 162 Excavations (Archaeology) 158 Land use 157 Land tenure 152 Outdoor recreation 151 Agriculture 150 Indian reservations 146 Forest management 136 Copper mines and mining 135 Murder 135 Pueblo Indians 135 Economic conditions 134 Statistics 129 Education 128 Travel 125 Claims 123 Outlaws 123 Housing 122 Legislative amendments 119 Wilderness areas 116 Irrigation 115 Recreational use 108 General 107 Boundaries 106 Water resources development 106 Natural history 105 Planning 105 Finance 102 Social conditions 101 Dams 94 Soils 92 City planning 91 Gold mines and mining 91 Population 88 Missions 86 Investigation 84 Mexican Americans 83 Sheriffs 82 Water quality 82 Trails 81 Fiction 79 Research 79 Floods 77 Government policy 72 Law 72 Government relations 71 Regional planning 71 Tohono O'odham Indians 71 Ecology 70 Maps, Topographic 70 Evaluation 69 Environmental conditions 68 Periodicals 67 Stream measurements 66 Pima Indians 65 Ponderosa pine 64 Brady, Joanna (Fictitious character) 62 Hohokam culture 62 Indian land transfers 62 Railroads 62 Cotton 60 Economic aspects 60 National monuments 60 Paleontology 60 Revenge 60 Silver mines and mining 60 Study and teaching 60 Conservation of natural resources 59 Water 59 Birds 58 Land transfers 58 Diseases and pests 57