Geological Survey (U.S.) 13,967 Geological Survey (U.S.), 2,197 United States. Bureau of Land Management 1,325 United States. Central Intelligence Agency 1,195 United States. Forest Service, 627 United States. National Aeronautics and Space Administration 546 National Operations Center (U.S.) 482 U.S. Atomic Energy Commission 409 United States. Forest Service 395 United States. Bureau of Land Management, 339 National Science and Technology Center (U.S.) 303 National Operations Center (U.S.), 302 United States. National Park Service 244 Kentucky Geological Survey 236 U.S. Fish and Wildlife Service 205 Planetary Geology Program (U.S.) 198 United States. Bureau of Land Management. Montana State Office 194 Geometronics Service Center (U.S.) 189 United States. Defense Mapping Agency. Hydrographic/Topographic Center 182 United States. Natural Resources Conservation Service 182 Colorado Geological Survey 165 United States. National Park Service, 163 United States. Forest Service. Southern Region 129 Florida 121 Indiana. Department of Natural Resources 111 United States. Bureau of Land Management. New Mexico State Office 111 National Cartography and Geographic Information Systems Center (U.S.) 109 United States. Bureau of Land Management. Colorado State Office 108 Cobb, Edward Huntington, 1916- 107 Colton, Roger B. 1924- 102 National Geographic Society (U.S.). Cartographic Division 102 United States. Bureau of Land Management. Oregon State Office 102 Afghanistan. Department of Geological Survey 101 Virginia. Department of Environmental Quality 101 United States. Bureau of Land Management. Wyoming State Office 98 Virginia. Division of Soil and Water Conservation 98 Bromery, Randolph W. 1926-2013 96 Pennsylvania. Bureau of Topographic and Geologic Survey 91 United States. Forest Service. Eastern Region 90 United States. Congress. Joint Committee on Taxation 88 Virginia. Division of Mineral Resources 88 California. Division of Mines and Geology 87 United States. Soil Conservation Service 87 United States. Bureau of Land Management. California State Office 86 United States. Agency for International Development 85 California. Department of Water Resources 80 Montana Bureau of Mines and Geology 77 Turner, Kenzie J. 74 Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī 71 National Applied Resource Sciences Center (U.S.) 70 United States. Forest Service. Pacific Northwest Region 70 United States. Forest Service. Intermountain Region 68 Scott, Glenn R., 1918-2012 67 Dames & Moore 65 Davis, Philip A. 1950- 65 Maryland Geological Survey 64 National Wildlife Refuge System (U.S.) 64 Bohannon, Robert G. 63 United States. Army. Corps of Engineers 61 Illinois State Geological Survey 60 National Science Foundation (U.S.) 60 United States. National Oceanic and Atmospheric Administration 60 United States. Forest Service. Rocky Mountain Region 59 United States. National Ocean Service 59 Hackman, Robert J. 58 United States. Defense Mapping Agency 58 United States. Bureau of Land Management. Idaho State Office 57 University of Texas at Austin. Bureau of Economic Geology 57 Planetary Geology and Geophysics Program (U.S.) 55 Zandle, Gerald L. 55 United States. Bureau of Land Management. Montana State Office, 54 United States. Bureau of Land Management. Oregon State Office, 53 Clark, Perry S. 52 United States. Bureau of Land Management. Arizona State Office 52 Richmond, Gerald Martin, 1914- 51 United States. Bureau of Land Management. Nevada State Office 51 United States. Department of Energy 51 Gilbert, Francis P. 49 United States. Bureau of Land Management. California State Office, 49 United States. Forest Service. Southwestern Region 48 Wisconsin Geological and Natural History Survey 48 Zietz, Isidore, 1919- 48 Massachusetts. Department of Public Works 47 Southwest Florida Water Management District (Fla.) 47 United States. Environmental Protection Agency 47 Henderson, John R. 46 U.S. Coast and Geodetic Survey 46 United States. Bureau of Indian Affairs 45 West Virginia Geological and Economic Survey 45 Billingsley, George H. 44 Ohio 44 Ohio. Division of Geological Survey 44 Roehler, Henry W. 44 Water Resources Council (U.S.) 44 Balsley, J. R. 43 Delaware Geological Survey 43 Fullerton, David S. 43 National Geographic Maps (Firm) 43 State Geological and Natural History Survey of Connecticut 43 Stover, Carl W. 43