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