Geological Survey (U.S.) 481
Geological Survey (U.S.), 138
SpringerLink (Online service) 46
Geological Society of America 23
U.S. Atomic Energy Commission 20
ScienceDirect (Online service) 18
American Association of Petroleum Geologists 17
Infobase, 16
Films for the Humanities & Sciences (Firm) 15
Infobase 15
Ratcliffe, Nicholas M. 1938- 14
Vermont Geological Survey 13
Ryder, Robert T. 11
Sims, P. K. 1918-2011 10
United States. Department of Energy 10
United States. Department of Energy. Nevada Operations Office 10
Walsh, Gregory J. 10
Decade of North American Geology Project 9
Dean, Basil, 1888-1978 8
Kentucky Geological Survey 8
Osterwald, Frank W. 8
Montana Bureau of Mines and Geology 7
State Geological and Natural History Survey of Connecticut 7
Weems, R. E. 7
Carter, Janet M. 6
Dickinson, William R. 6
Geological Survey of Pakistan 6
Harrison, Jack Edward, 1924- 6
Langenheim, Victoria E. 6
Mukherjee, Soumyajit, 6
New Hampshire. Water Division 6
Nokleberg, Warren J. 6
Post, Edwin V. 1928- 6
Redden, Jack A. 1926-2019 6
Rhode Island Development Council, 6
South Dakota. Department of Environment and Natural Resources 6
United States. Environmental Protection Agency 6
Vermont. Agency of Natural Resources 6
West Dakota Water Development District (S.D.) 6
Black Hills Conservancy Sub-District (S.D. and Wyo.) 5
Burton, William C. 1952- 5
Colorado Geological Survey 5
Drake, Avery Ala, 1927- 5
Fox, J. E. 1943- 5
Gohn, Gregory S. 5
Hampton Roads Planning District Commission (Va.) 5
King, Philip B., 1903-1987 5
Mills, K. R. 5
New Hampshire. Geological Survey 5
New Jersey Geological Survey 5
Reheis, Marith C. 5
Smith, Avery E. 5
South Dakota. Department of Water and Natural Resources 5
Stone, Byron D. 5
U.S. Nuclear Regulatory Commission 5
United States. National Park Service 5
Alaska. Division of Geological and Geophysical Surveys 4
Armstrong, Thomas R. 4
Blakey, Ronald C., 1945- 4
Brabb, Earl E., 1929- 4
Cannon, William F. 4
Carr, Michael D. 4
Catchings, Rufus Douglas 4
Florida Integrated Science Center 4
Fridrich, C. J. 4
Graymer, R. W. 4
Harris, Anita G. 4
Hildenbrand, T. G. 4
Hudson, Mark R. 4
Illinois State Geological Survey 4
Iowa Geological Survey 4
Johnson, Edward A. 1940- 4
Kansas Geological Survey 4
Keen, C. E. 4
Kelley, Vincent C. 1904-1988 4
Klasner, J. S. 4
Klasner, J. S., 4
Massachusetts. Executive Office of Environmental Affairs 4
Massachusetts. Geological Survey 4
Michigan. Geological Survey Division 4
Miller, David M. 1951- 4
Moore, David W. 4
National Science Foundation (U.S.) 4
Nelson, Arthur E. 1922- 4
Peters, S. G. 1948- 4
Ponce, David A. 4
Poppe, Lawrence J. 4
Powars, David S. 4
Rhea, Susan 4
Rocky Mountain Association of Geologists 4
Saltus, R. W. 4
Solomon, Barry J. 4
Speed, Robert C. 4
Stewart, J. H., 1928-2013 4
Stone, Janet Radway 4
United States. Agency for International Development 4
Varnes, David J. 1919- 4
Wallace, C. A. 1942- 4
Wheeler, Russell L. 4
Allegro Productions (Firm) 3