Geological Survey (U.S.) 13,618 Geological Survey (U.S.), 2,172 United States. Bureau of Land Management 1,306 United States. Central Intelligence Agency 1,178 United States. Forest Service, 620 National Operations Center (U.S.) 481 United States. National Aeronautics and Space Administration 481 U.S. Atomic Energy Commission 409 United States. Forest Service 396 United States. Bureau of Land Management, 334 National Science and Technology Center (U.S.) 303 National Operations Center (U.S.), 298 United States. National Park Service 243 Kentucky Geological Survey 219 U.S. Fish and Wildlife Service 204 Planetary Geology Program (U.S.) 196 United States. Bureau of Land Management. Montana State Office 194 Geometronics Service Center (U.S.) 190 United States. Defense Mapping Agency. Hydrographic/Topographic Center 182 United States. Natural Resources Conservation Service 182 United States. National Park Service, 160 Colorado Geological Survey 144 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 United States. Bureau of Land Management. Oregon State Office 102 Afghanistan. Department of Geological Survey 101 Virginia. Department of Environmental Quality 101 National Geographic Society (U.S.). Cartographic Division 99 United States. Bureau of Land Management. Wyoming State Office 98 Virginia. Division of Soil and Water Conservation 98 Cobb, Edward Huntington, 1916- 97 Colton, Roger B. 1924- 97 Bromery, Randolph W. 1926-2013 96 Pennsylvania. Bureau of Topographic and Geologic Survey 90 United States. Forest Service. Eastern Region 90 Virginia. Division of Mineral Resources 88 United States. Soil Conservation Service 87 California. Division of Mines and Geology 86 United States. Bureau of Land Management. California State Office 86 United States. Agency for International Development 83 California. Department of Water Resources 80 Montana Bureau of Mines and Geology 74 Turner, Kenzie J. 74 Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī 71 United States. Forest Service. Pacific Northwest Region 71 National Applied Resource Sciences Center (U.S.) 70 United States. Forest Service. Intermountain Region 68 Dames & Moore 65 Davis, Philip A. 1950- 65 National Wildlife Refuge System (U.S.) 64 Maryland Geological Survey 63 Bohannon, Robert G. 61 United States. Army. Corps of Engineers 61 Illinois State Geological Survey 60 United States. Forest Service. Rocky Mountain Region 60 United States. National Oceanic and Atmospheric Administration 60 National Science Foundation (U.S.) 59 Scott, Glenn R., 1918-2012 58 United States. National Ocean Service 58 United States. Bureau of Land Management. Idaho State Office 57 Hackman, Robert J. 56 Planetary Geology and Geophysics Program (U.S.) 55 United States. Defense Mapping Agency 55 Zandle, Gerald L. 55 United States. Bureau of Land Management. Montana 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. Oregon State Office, 51 United States. Bureau of Land Management. California State Office, 49 United States. Bureau of Land Management. Nevada State Office 49 Wisconsin Geological and Natural History Survey 48 United States. Forest Service. Southwestern Region 47 University of Texas at Austin. Bureau of Economic Geology 47 Henderson, John R. 46 United States. Environmental Protection Agency 46 West Virginia Geological and Economic Survey 45 Massachusetts. Department of Public Works 44 Ohio 44 Ohio. Division of Geological Survey 44 U.S. Coast and Geodetic Survey 44 Water Resources Council (U.S.) 44 Balsley, J. R. 43 Delaware Geological Survey 43 Gilbert, Francis P. 43 Tennessee Valley Authority. Maps and Surveys Department 43 United States. Bureau of Indian Affairs 43 United States. Bureau of Land Management. Utah State Office 43 Billingsley, George H. 42 National Geographic Maps (Firm) 42 Fullerton, David S. 41 Geospatial Service and Technology Center (U.S.) 41 Southwest Florida Water Management District (Fla.) 41 United States. Department of Energy 41 United States. Forest Service. Pacific Northwest Region, 41 State Geological and Natural History Survey of Connecticut 40