Geological Survey (U.S.) 9,955 Geological Survey (U.S.), 2,943 United States. Central Intelligence Agency 1,077 United States. Bureau of Land Management 827 United States. Forest Service, 784 United States. Bureau of Land Management, 444 National Operations Center (U.S.) 418 United States. National Aeronautics and Space Administration 414 U.S. Atomic Energy Commission 404 National Operations Center (U.S.), 374 United States. Forest Service 320 United States. National Park Service, 279 United States. National Park Service 231 Colorado Geological Survey 216 U.S. Fish and Wildlife Service 203 United States. Defense Mapping Agency. Hydrographic/Topographic Center 177 Kentucky Geological Survey 130 United States. Bureau of Land Management. Montana State Office 116 Geometronics Service Center (U.S.) 114 Cobb, Edward H. 1916-1983 107 SpringerLink (Online service) 106 National Geographic Society (U.S.). Cartographic Division 103 Colton, Roger B. 1924- 101 Afghanistan. Department of Geological Survey 99 California. Division of Mines and Geology 97 United States. Bureau of Land Management. New Mexico State Office 97 Bromery, Randolph W. 1926-2013 96 United States. Congress. Joint Committee on Taxation 88 United States. Natural Resources Conservation Service 87 United States. Agency for International Development 83 United States. Bureau of Land Management. Wyoming State Office 82 United States. Soil Conservation Service 80 United States. Forest Service. Southern Region 77 Montana Bureau of Mines and Geology 76 United States. Central Intelligence Agency, 73 Planetary Geology Program (U.S.) 72 Turner, Kenzie J. 72 National Science and Technology Center (U.S.) 71 Southwest Florida Water Management District (Fla.) 71 Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī 69 Dames & Moore 69 United States. Environmental Protection Agency 68 United States. Forest Service. Pacific Northwest Region 68 Afghan Geological Survey, 66 Scott, Glenn R., 1918-2012 66 Davis, Philip A. 1950- 64 Maryland Geological Survey 63 National Wildlife Refuge System (U.S.) 63 United States. National Oceanic and Atmospheric Administration 63 U.S. Task Force for Business and Stability Operations 62 United States. Bureau of Land Management. Oregon State Office, 62 United States. Bureau of Land Management. Montana State Office, 60 Bohannon, Robert G. 59 United States. Forest Service. Intermountain Region 59 Hackman, Robert J. 58 United States. Forest Service. Eastern Region 58 University of Texas at Austin. Bureau of Economic Geology 58 Zandle, Gerald L. 55 United States. Bureau of Land Management. California State Office 54 National Science Foundation (U.S.) 53 United States. Bureau of Land Management. California State Office, 53 United States. Bureau of Land Management. Oregon State Office 53 Clark, Perry S. 52 United States. Forest Service. Rocky Mountain Region 52 Planetary Geology and Geophysics Program (U.S.) 51 United States. Department of Energy 51 Richmond, Gerald Martin, 1914- 50 Fox, J. E. 1943- 49 Gilbert, Francis P. 49 Nevada Bureau of Mines and Geology 48 United States. Bureau of Indian Affairs 48 United States. Bureau of Land Management. Colorado State Office 48 United States. Forest Service. Pacific Northwest Region, 48 Billingsley, George H. 47 Zietz, Isidore, 1919- 47 Henderson, John R. 46 Roehler, Henry W. 44 United States. Forest Service. Southwestern Region 44 Balsley, J. R. 43 Fullerton, David S. 42 National Geographic Maps (Firm) 42 State Geological and Natural History Survey of Connecticut 42 Stover, Carl W. 42 U.S. Fish and Wildlife Service, 42 Utah Geological and Mineral Survey 42 Water Resources Council (U.S.) 42 Massachusetts. Department of Public Works 41 Garver, John B., Jr 40 Higley, Debra K. 40 United States. Forest Service. Southern Region, 40 Minnesota Geological Survey 39 United States. Bureau of Land Management. Arizona State Office 39 Witkind, Irving J. 1917-2008 39 New Mexico. Bureau of Mines and Mineral Resources 38 Shupe, John F. 38 United States. Army. Corps of Engineers 38 United States. Bureau of Reclamation 38 United States. Forest Service. Southwestern Region, 38 Meuschke, J. L. 37 Rowley, Peter D. 37