Geological Survey (U.S.) 25,374 Geological Survey of Canada 3,448 Kentucky Geological Survey 2,101 U.S. Atomic Energy Commission 1,341 Geological Society of America 1,081 Dibblee, T. W (Thomas Wilson), 1911-2004 1,005 Tennessee Division of Geology 851 Australia Bureau of Mineral Resources, Geology and Geophysics 820 California Division of Mines and Geology 756 International Geological Congress 683 Minch, John A (John Albert) 669 Tennessee Valley Authority 660 SpringerLink (Online service) 655 Dibblee Geology Center 644 United States National Aeronautics and Space Administration 575 American Association of Petroleum Geologists 574 Geological Survey of Western Australia 506 Geological Survey of Great Britain 504 British Geological Survey 467 Illinois State Geological Survey 439 Wilson, Charles W., Jr., 1905-1985 427 Pennsylvania Bureau of Topographic and Geologic Survey 416 State Geological and Natural History Survey of Connecticut 403 Geological Survey (South Africa) 374 Stanford Geological Survey 372 Montana Bureau of Mines and Geology 358 Kansas Geological Survey 353 Geological Survey of India 351 West Virginia Geological and Economic Survey 350 Geological Society of London 335 Fiske Icelandic Collection 305 Chishitsu Chōsajo (Japan) 300 Minnesota Geological Survey 295 Australia Geological Branch 281 Darwin, Charles, 1809-1882 274 Geological Survey of Wyoming 269 Nevada Bureau of Mines and Geology 264 Maryland Geological Survey 260 Williams and Heintz Map Corporation 259 Massachusetts Department of Public Works 258 American Geological Institute 256 University of Texas at Austin Bureau of Economic Geology 254 Oregon Department of Geology and Mineral Industries 251 Washington (State) Division of Geology and Earth Resources 250 United States National Park Service 249 North Dakota Geological Survey 247 Darton, Nelson Horatio, 1865-1948 236 New Mexico Bureau of Mines and Mineral Resources 236 Geological Association of Canada 231 United States Department of the Interior 230 Oklahoma Geological Survey 229 Lyell, Charles, Sir, 1797-1875 225 Jillson, Willard Rouse, 1890-1975 224 Ehrenspeck, Helmut E 220 Colorado Geological Survey 218 Indiana Geological Survey 218 A. Hoen & Co 214 American Geophysical Union 210 Wilson, Charles William Jr 210 Michigan Geological Survey Division 203 United States Bureau of Mines 203 United States Department of Energy 199 Senécal, C. O (Clovis Omer) 198 Utah Geological Survey 198 Ontario Geological Survey 194 United States Army. Corps of Engineers 192 Delaware Geological Survey 191 Ohio Division of Geological Survey 191 Colton, Roger B (Roger Burnham), 1924- 188 Missouri Division of Geology and Land Survey 186 Museum of Practical Geology (Great Britain) 186 Iowa Geological Survey 183 New York State Geological Survey 182 Roehler, Henry W 179 Virginia Division of Mineral Resources 178 Institute of Geological Sciences (Great Britain) 177 Canadian Society of Petroleum Geologists 173 Geological Survey of Pakistan 171 Thomas W. Dibblee, Jr. Geological Foundation 166 Rowley, Peter D 165 Utah Geological and Mineral Survey 165 Wisconsin Geological and Natural History Survey 165 Geological Survey of Alabama 162 Sveriges geologiska undersökning 160 Arizona Geological Survey 159 Hackman, Robert J 159 Chishitsu Chōsajo (Japan) 158 United States Bureau of Land Management 156 Unesco 152 American Association of Petroleum Geologists Pacific Section 149 Maine Geological Survey 148 Ontario Department of Mines 148 United States Army Map Service 147 Miller, Robert A 143 Geological Survey of Pennsylvania 142 Stose, George Willis, 1869-1960 142 Geological Survey of Queensland 141 Moore, Samuel L 140 Richmond, Gerald Martin, 1914- 140 Yale University 140