Author
Geological Survey (U.S.)
2,332
United States. Central Intelligence Agency
646
United States. Forest Service,
165
United States. Forest Service
161
Geological Survey (U.S.),
148
United States. Bureau of Land Management
137
National Geographic Society (U.S.). Cartographic Division
104
Geometronics Service Center (U.S.)
89
United States. National Park Service
76
United States. National Aeronautics and Space Administration
70
United States. Bureau of Land Management,
69
Colorado Geological Survey
66
California. Division of Mines and Geology
62
National Geographic Maps (Firm)
44
United States. Forest Service. Southern Region
43
United States. Forest Service. Intermountain Region
42
Water Resources Council (U.S.)
42
United States. Forest Service. Pacific Northwest Region
41
Garver, John B., Jr
40
University of Texas at Austin. Bureau of Economic Geology
40
Shupe, John F.
39
National Operations Center (U.S.),
37
United States. Forest Service. Eastern Region
36
United States. National Park Service,
36
Planetary Geology and Geophysics Program (U.S.)
31
Carroll, Allen
30
Cobb, Edward H. 1916-1983
30
United States. Forest Service. Rocky Mountain Region
30
Geological Society of America
28
Nevada Bureau of Mines and Geology
27
United States. Forest Service. Southwestern Region
26
Bromery, Randolph W. 1926-2013
25
National Geographic Society (U.S.)
25
U.S. Atomic Energy Commission
25
United States. Environmental Protection Agency
25
New Mexico. Bureau of Mines and Mineral Resources
24
Montana Bureau of Mines and Geology
23
Colton, Roger B. 1924-
22
Henderson, John R.
22
Kentucky Geological Survey
22
Minnesota Geological Survey
22
National Operations Center (U.S.)
22
National Science and Technology Center (U.S.)
21
United States. Forest Service. Pacific Northwest Region,
20
National Science Foundation (U.S.)
19
Barnes, Virgil E. 1903-1998
18
Gilbert, Francis P.
18
Illinois State Geological Survey
18
Scott, Glenn R., 1918-2012
18
Tennessee. Division of Geology
18
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