Author
Geological Survey (U.S.)
2,012
United States Forest Service
208
United States Forest Service. Rocky Mountain Region
185
U.S. Atomic Energy Commission
150
United States Bureau of Land Management
133
Colorado Geological Survey
128
Scott, Glenn R., 1918-2012
96
H.M. Gousha Company
82
Rand McNally and Company
78
Cater, Fred W (Fred William), 1912-
74
United States National Park Service
60
Geometronics Service Center (U.S.)
56
O'Sullivan, Robert Brett, 1923-
56
United States Bureau of Land Management. Colorado State Office
56
American Automobile Association
48
National Operations Center (U.S.)
48
Braddock, William A., 1929-2003
45
Colorado State Metal Mining Fund
45
Maberry, John O., 1935-
45
Colorado Department of Local Affairs. Division of Planning
43
Roehler, Henry W
42
Sanborn Map Company
40
Bryant, Bruce, 1930-
38
Hansen, Wallace R., 1920-
38
Taylor, Richard B (Richard Bartlett)
32
Burbank, W. S (Wilbur Swett), 1898-1975
31
Luedke, Robert G
31
Hackman, Robert J
29
Bryant, Bruce
28
Colorado Water Conservation Board
28
Olson, J. C (Jerry Chipman), 1917-2013
28
Tweto, Ogden, 1912-1983
28
Washburn, F. E
28
Hedlund, David Carl, 1924-
27
Cross, Whitman, 1854-1949
26
Hillier, Donald E
26
Pierson Graphics Corp
26
Hail, William J (William James), Jr., 1922-
25
McKay, E. J
25
United States Soil Conservation Service
23
Soister, Paul E
22
United States Bureau of Reclamation
22
Wobus, Reinhard A
22
Hail, William J (William James), Jr., 1922-2018
21
Lipman, Peter W
21
Braddock, William A., 1929-
20
Johnson, Ronald C (Ronald Carl), 1950-
20
Steven, Thomas A (Thomas August), 1917-2013
20
AAA (Organization : U.S.)
19
Colorado Department of Highways
19
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