Author
United States. National Park Service
Geological Survey (U.S.)
7
Billingsley, George H.
2
Campbell, Bruce G.,
1
Colorado National Monument Association
1
Geological Survey (U.S.),
1
Hampton, Haydee M.
1
Horton, J. Wright
1
Scott, Robert B.
1
Southworth, Scott, 1957-
1
Turner, Kenzie J.
1
United States. Bureau of Land Management. Arizona Strip District
1
United States. National Aeronautics and Space Administration
1
Wellmeyer, Jessica L.
1