Richard Porter Sheldon

Assessment of undiscovered pho

Assessment of undiscovered phosphate resource potential of the Dominican Republic

1986

Undiscovered phosphate resourc

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

1985

Relation between specific grav

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

1964

Physical stratigraphy and mine

Physical stratigraphy and mineral resources of Permian rocks in western Wyoming

1963

Geochemistry of uranium in pho

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

1959

Physical stratigraphy of the P

Physical stratigraphy of the Phosphoria formation in northwestern Wyoming

1957

Stratigraphic sections of the

Stratigraphic sections of the Phosphoria Formation in Wyoming, 1952

1954

Stratigraphic sections of the

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

1953

Program for geological researc

Program for geological research on phosphate deposits of Turkey

1952