Author
Geological Survey (U.S.)
4,276
SpringerLink (Online service)
2,161
United States. Government Accountability Office
914
Geological Survey (U.S.),
677
United States. Central Intelligence Agency
668
ScienceDirect (Online service)
490
United States. Government Accountability Office,
318
United States. General Accounting Office
223
Oxford Scholarship Online
218
United States. Bureau of Land Management
197
EBSCOhost
190
United States. Forest Service
183
United States. Forest Service,
166
National Water-Quality Assessment Program (U.S.)
149
United States. National Park Service
140
Colorado Geological Survey
111
United States. Environmental Protection Agency
111
National Geographic Society (U.S.). Cartographic Division
104
United States. National Aeronautics and Space Administration
93
Geometronics Service Center (U.S.)
90
ProQuest (Firm)
80
United States. Bureau of Land Management,
72
United States. Department of Energy
70
United States. Bureau of Reclamation
67
California. Division of Mines and Geology
63
United States. Army. Corps of Engineers
54
Geological Survey (U.S.). Water Resources Division
50
United States. Joint Financial Management Improvement Program
47
United States. Forest Service. Southern Region
45
National Geographic Maps (Firm)
44
United States. Forest Service. Intermountain Region
44
United States. Government Printing Office
43
Water Resources Council (U.S.)
43
Colorado Water Resources Research Institute
42
United States. Forest Service. Pacific Northwest Region
42
University of Texas at Austin. Bureau of Economic Geology
41
Garver, John B., Jr
40
Shupe, John F.
39
U.S. Fish and Wildlife Service
39
Southwest Florida Water Management District (Fla.)
38
United States. Bureau of Indian Affairs
38
Colorado State University. Environmental Resources Center
37
National Operations Center (U.S.),
37
United States. Forest Service. Eastern Region
37
United States. National Park Service,
37
Geological Society of America
35
United States. National Oceanic and Atmospheric Administration
35
United States. Office of Water Resources Research
35
Colorado. General Assembly. Legislative Council
33
Montana Bureau of Mines and Geology
33
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