History 2,180 Indians of North America 542 Description and travel 509 Groundwater 509 Flood insurance 442 Housing 381 Law and legislation 346 Maps 346 Politics and government 312 Geology 309 African Americans 298 Environmental aspects 295 Fiction 272 Antiquities 266 Statistics 254 Water quality 242 Water-supply 242 General 229 Finance 228 Population 222 Social conditions 214 Seminole Indians 208 Land titles 206 Mortgage banks 195 Diseases and pests 193 Navigation improvements 192 Roads 189 FICTION 188 Discovery and exploration 187 Economic conditions 185 Hydrology 183 Navigation 182 Railroads 182 Race relations 181 Social life and customs 181 Soils 175 Cuban Americans 174 Murder 174 Hydrographic surveying 172 Management 171 Claims 166 Public lands 162 Agriculture 160 Ecology 158 Private investigators 153 Research 153 Aquifers 149 Education 148 National parks and reserves 147 Legislative amendments 145 Travel 145 Rivers, creeks, streams, etc 140 Cost 137 Environmental conditions 136 Mortgage loans 135 Natural history 131 Water 129 Wetlands 128 Dredging 127 Counties 126 Older people 125 Economic aspects 122 Buildings, structures, etc 121 Restoration ecology 121 Law 120 Channels (Hydraulic engineering) 119 Land claims 119 Regional planning 119 Legislative resolutions 116 Control 115 Families 115 Land use 114 Paleontology 114 Pollution 113 Hurricanes 109 Investigation 109 Land grants 109 Contested elections 108 Planning 108 Shipwrecks 107 Soil surveys 107 Wages 107 Police 103 Spanish 100 Excavations (Archaeology) 98 Harbors 96 Architecture 93 Foreign relations 93 City planning 92 Fishes 92 Registration and transfer 90 Cubans 89 Fishing 89 Geology, Stratigraphic 89 Civil rights 88 Groundwater flow 88 Flood forecasting 87 Man-woman relationships 87 Veterans 87 Water quality management 87