U.S. Dept. of the Interior, Geological Survey,
Sheldon, R. P.
Geological Survey (U.S.)
U.S. Atomic Energy Commission.
Geological Survey circular, 0364-6017 ; 307
Stratigraphic sections of the Phosphoria Formation in Wyoming, 1949-50
Stratigraphic sections of the Phosphoria Formation in Wyoming, 1949-50
Stratigraphic sections of the Phosphoria Formation in Wyoming, 1949-50