Author
Geological Survey (U.S.)
21
U.S. Atomic Energy Commission
17
Witkind, Irving J. 1917-2008
6
Hackman, Robert J.
5
Detterman, J. S.
3
Pillmore, C. L., 1930-
2
Aeronautical Chart and Information Center (U.S.)
1
Condon, Steven M.
1
McQueen, Kathleen
1
Minard, James P.
1
Navajo Tribe of Arizona, New Mexico & Utah
1
O'Sullivan, Robert Brett, 1923-
1
Olson, A. B.
1
United States. Bureau of Indian Affairs
1