EBSCOhost 78
New Mexico Geological Society. Annual Field Conference 60
Geological Survey (U.S.) 34
Colorado Geological Survey 23
United States. Forest Service 22
United States. National Park Service, 19
United States. National Park Service. Division of Publications 17
United States. National Park Service 15
Geological Survey (U.S.), 14
U.S. Fish and Wildlife Service 14
United States. Forest Service, 13
Exxon Mobil Corporation 12
Wyoming Geological Association 12
Aldrich, John K. 11
SpringerLink (Online service) 11
United States. Forest Service. Intermountain Region 11
United States. National Park Service. Natural Resource Stewardship and Science, 11
Billings Geological Society. Field Conference 10
Lee, Cynthia, 10
MacDonald, John, 10
Wyoming Geological Association. Annual Field Conference 10
United States. Bureau of Land Management 9
Utah Geological Association 9
Hafen, LeRoy R. 1893-1985 8
John A. Volpe National Transportation Systems Center (U.S.) 8
North Dakota Geological Survey 8
Geological Society of America. Rocky Mountain Section. Annual Meeting 7
Gregory, Lee 7
Lucas, Spencer G. 7
American Automobile Association 6
Decade of North American Geology Project 6
Lueth, Virgil W. 1958- 6
New Mexico Geological Society 6
Ogrizek, Doré, 1899- 6
Rapoza, Amanda S., 6
Rocky Mountain Association of Geologists 6
United States. Forest Service. Southwestern Region 6
Utah Geological Association. Field Conference 6
Chronic, Halka 5
Grand Junction Geological Society 5
Kennedy, Roger G. 5
Martin, Bob, 1920- 5
Nezperce National Forest (Agency : U.S.) 5
Uinta-Wasatch-Cache National Forest (Agency : U.S.), 5
United States. Bureau of Mines 5
Whitehorne, Joseph W. A., 1943- 5
Wood, Stanley 5
Adkison, Ron 4
American Geological Institute 4
Arizona Geological Society 4
Averett, Walter R. 4
Callender, J. F. 4
Caughey, Bruce, 1960- 4
Center of Military History, 4
Clemons, Russell E. 4
Colorado. Division of Wildlife 4
Colorado. Tourism Office 4
Federal Writers' Project 4
Fielder, John 4
Four Corners Geological Society 4
Geological Society of America 4
Geological Society of America. Rocky Mountain Section 4
Gurgel, Klaus D. 4
Holland, F. D. 1924-2023 4
James, H. L. 1912-2000 4
Kelsey, Michael R. 4
Kreutzer, Lee 4
Roach, Gerry 4
Ruth, Kent 4
Schneider, Bill 4
Schulz, Noah, 4
Society of Economic Geologists (U.S.) 4
Society of Economic Paleontologists and Mineralogists. Permian Basin Section 4
Ulmer-Scholle, D. S. 1958- 4
United States. Forest Service. Pacific Southwest Region, 4
Allen, Steve, 1951- 3
Alt, David D. 3
American Association of Petroleum Geologists. Energy Minerals Division 3
American Association of Petroleum Geologists. Rocky Mountain Section. Meeting 3
Austin, George S. 3
Baars, Donald L. 3
Barnes, F. A. 1922- 3
Bjørnstad, Eric 3
Blair, Rob, 1943- 3
Bluemle, John P. 3
Center of Military History 3
Chamberlin, Richard M. 3
Colorado. Division of Parks and Outdoor Recreation 3
Combat Studies Institute (U.S.), 3
DeHaan, Vici 3
Fassett, James E. 3
Ford, Norman D., 1921- 3
Geological Association of Canada 3
Gilliland, Mary Ellen 3
Hyndman, Donald W. 3
Intermountain Association of Petroleum Geologists (U.S.) 3
Kelley, Vincent C. 1904-1988 3
Mack, Greg H. 3
McLemore, Virginia T. 3
McTighe, James 3