History 787 Geology 544 Indians of North America 543 Law and legislation 488 Environmental aspects 465 Maps 338 Flood insurance 273 Mines and mineral resources 233 Water quality 233 Water-supply 225 Housing 214 Statistics 211 Finance 188 Roads 184 Politics and government 181 Groundwater 176 Forest management 174 Water resources development 174 Description and travel 170 Pollution 160 Land use, Rural 159 Planning 159 Management 151 Outdoor recreation 143 Agriculture 141 National parks and reserves 139 Economic aspects 137 Population 135 Water 135 Forest reserves 134 Eruption, 1980 129 Forests and forestry 124 High schools 124 Education 122 Schools 117 Soils 116 Vampires 116 Economic conditions 114 Police 112 Antiquities 110 Land tenure 110 Land use 110 Social life and customs 105 Fiction 102 General 102 Flood forecasting 101 Fishes 97 Wildlife refuges 96 City planning 93 Environmental conditions 93 Volcanoes 93 Geology, Stratigraphic 92 Recreation areas 92 Social conditions 92 Man-woman relationships 90 Evaluation 88 Friendship 87 Historic sites 87 Mortgage banks 87 FICTION 86 Frontier and pioneer life 84 Research 84 Wilderness areas 82 Ecology 80 Legal status, laws, etc 80 Hydroelectric power plants 78 Land titles 78 Murder 78 Wild and scenic rivers 77 Douglas fir 76 Japanese Americans 76 Buildings, structures, etc 75 Law 75 Fishing 74 Safety measures 74 Claims 73 Freshwater fishes 73 Registration and transfer 73 Beaumont, J. P. (Fictitious character) 72 Habitat 72 Harbors 72 Soil surveys 72 Trails 72 Transportation 72 Women 72 Buildings 71 Werewolves 71 Wetlands 69 Fishery management 67 Recreational use 67 Mortgage loans 66 Taxation 66 Fish communities 64 Study and teaching 64 Diseases and pests 63 Families 63 Measurement 63 Public lands 63 Railroads 63 Wages 63