History 3,373 Indians of North America 2,930 Geology 2,535 Politics and government 2,362 Description and travel 2,217 Eskimos 1,696 Environmental aspects 1,382 Mines and mineral resources 1,343 Law and legislation 1,266 Public lands 972 Travel 772 Social life and customs 763 Legal status, laws, etc 699 Gold mines and mining 663 Maps 653 Economic conditions 609 Claims 522 Forest management 500 National parks and reserves 497 Petroleum 489 Antiquities 477 Land use 470 Railroads 464 Fisheries 460 Geology, Stratigraphic 426 Roads 414 Transportation 401 Education 400 Gold discoveries 397 Land tenure 387 Missions 387 Discovery and exploration 384 Frontier and pioneer life 376 Constitutions 371 Management 365 Law 349 Research 346 Petroleum industry and trade 334 Ore deposits 331 Fishes 330 Natural history 324 Oil and gas leases 321 Alaska Natives 319 Hunting 314 Logging 314 Land titles 312 Wilderness areas 312 Registration and transfer 305 Social conditions 305 Periodicals 304 Ecology 302 Manners and customs 299 Oil spills 296 Natural resources 294 Environmental conditions 293 Wildlife refuges 290 Aleuts 284 Forests and forestry 281 Earthquakes 280 Forest reserves 280 Paleontology 270 Tlingit Indians 269 Boundaries 267 By-laws 266 Natural gas 265 World War, 1939-1945 263 Birds 258 Geochemical prospecting 241 Budget 240 Water-supply 237 Wildlife conservation 234 Officials and employees 229 Statistics 227 Russians 226 Economic aspects 218 Inuit 218 Glaciers 213 Discoveries in geography 212 Coal 210 Groundwater 210 Expenditures, Public 209 Geomagnetism 206 Indian land transfers 204 Navigation 204 Sealing 202 Economic history 200 Yupik Eskimos 192 Pollution 191 Population 190 Agriculture 187 Coal mines and mining 181 Geochemistry 178 Harbors 177 Planning 177 Prospecting 173 Natural gas pipelines 172 Government relations 171 Bibliography 167 Mineral industries 166 PRO Schimmel, Caroline F. (donor) (Schimmel Collection copy) 166