Author
Geological Survey (U.S.)
3
Geological Survey (U.S.),
3
Butler, G. Montague 1881-1961
2
Colorado Geological Survey
2
Waagé, Karl M. 1915-1999
2
Waagé, Karl M. 1915-1999,
2
Hart, Stephen S.
1
Keller, W. D., 1900-2001
1
Schultz, Leonard G.
1
Schultz, Leonard Gene, 1926-
1
Scott, Glenn R., 1918-2012
1
U.S. Atomic Energy Commission
1
U.S. Atomic Energy Commission,
1
U.S. Atomic Energy Commission. Technical Information Service
1
Van Sant, Joel N.
1
Weeks, Alice D.
1