Author
Geological Survey (U.S.)
8,070
Geological Survey (U.S.),
2,146
United States. Environmental Protection Agency
128
U.S. Fish and Wildlife Service
124
United States. Bureau of Reclamation
115
United States. Department of Energy. Nevada Operations Office
114
United States. National Park Service
114
United States. Bureau of Land Management
113
United States. Army. Corps of Engineers
105
United States. Department of Energy
99
Afghanistan. Department of Geological Survey
96
United States. Agency for International Development
95
Afghan Geological Survey,
67
U.S. Task Force for Business and Stability Operations
67
Turner, Kenzie J.
66
Davis, Philip A. 1950-
63
Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī
62
Saudi Arabia. Deputy Ministry for Mineral Resources
62
National Water-Quality Assessment Program (U.S.)
57
Bullock, John H.
55
Clark, Perry S.
52
Fox, J. E. 1943-
46
Bohannon, Robert G.
44
Maryland Geological Survey
43
Higley, Debra K.
40
Southwest Florida Water Management District (Fla.)
40
Colton, Roger B. 1924-
39
Nakata, Jennifer S.
39
Adrian, Betty M.
38
Hawaiian Volcano Observatory
38
Montana Bureau of Mines and Geology
38
Indiana. Department of Transportation
37
United States. Federal Emergency Management Agency
37
Missouri. Division of Geology and Land Survey
35
United States. Bureau of Indian Affairs
35
Poppe, Lawrence J.
33
United States. Forest Service
33
Kansas Geological Survey
32
Wright, Thomas L. 1935-
32
Afghanistan. Geological and Mineral Survey
30
Kokaly, Raymond F.,
30
McHugh, John B.
30
National Regional Aquifer Systems Analysis Program (U.S.)
30
Robinson, Bret A.
30
Voelker, David C.
30
Arkansas Soil and Water Conservation Commission
29
McGraw, J. P.
28
King, Trude V. V.,
27
Miller, Robert L. 1941-
27
Billingsley, George H.
26
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