Assessment of undiscovered phosphate resource potential of the Dominican Republic /

by Sheldon, Richard Porter, 1923-
Published 1986

Physical stratigraphy and mineral resources of Permian rocks in Western Wyoming /

by Sheldon, Richard Porter, 1923-
Published 1963

Physical stratigraphy of the Phosphoria formation in northwestern Wyoming /

by Sheldon, Richard Porter, 1923-
Published 1957

Relation between specific gravity and iron content of rocks from the Red Mountain Formation, Alabama /

by Sheldon, Richard Porter, 1923-
Published 1964

Geochemistry of uranium in phosphorites and black shales of the Phosphoria formation /

by Sheldon, Richard Porter, 1923-
Published 1959

Physical stratigraphy and mineral resources of Permian rocks in western Wyoming /

by Sheldon, Richard Porter, 1923-
Published 1963

Stratigraphic sections of the Phosphoria Formation in Wyoming, 1952 /

by Sheldon, Richard Porter, 1923-
Published 1954

Stratigraphic sections of the Phosphoria Formation in Idaho, 1949.

by Sheldon, Richard Porter, 1923-
Published 1953

Stratigraphic sections of the Phosphoria Formation in Wyoming, 1949-50 /

by Sheldon, Richard Porter, 1923-
Published 1953

Undiscovered phosphate resources in the Caribbean region and their potential value for agricultural development /

by Sheldon, Richard Porter, 1923-
Published 1985

Phosphate-rock resources of the United States /

by Cathcart, James Bachelder, 1917-, Gulbrandsen, Robert A., Sheldon, Richard Porter, 1923-
Published 1984

Progress report on investigations of western phosphate deposits /

by Swanson, Roger Warren, 1914-, McKelvey, V. E. (Vincent Ellis), 1916-, Sheldon, Richard Porter, 1923-
Published 1953

Undiscovered phosphate resources in the Caribbean region and their potential value for agricultural development /

Published 1985

A summary of phosphate-rock resources of the United States : an analysis of past estimates /

by Cathcart, James Bachelder, 1917-
Published 1981

Phosphate-rock resources of the United States /

by Cathcart, James Bachelder, 1917-
Published 1984

Report on the Marine Phosphatic Sediments Workshop : February 9-11, 1979, Honolulu, Hawaii U.S.A. /

Published 1979