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Estimates of Undiscovered Petroleum Resources: A Perspective
Gratis
Geochemistry of Uranium in Phosphorites and Black Shales of the Phosphoria Formation
Gratis
Physical Stratigraphy of the Phosphoria Formation in Northwestern Wyoming
Gratis
Report on the Marine Phosphatic Sediments Workshop: February 9-11, 1979, Honolulu, Hawaii U.S.A.
Gratis
Phosphate-rock Resources of the United States: Volume 888
Gratis
Progress Report on Investigations of Western Phosphate Deposits
Gratis
Stratigraphic Sections of the Phosphoria Formation: 1953 and 1954
Gratis
Lithium Anomaly Near Pringle, Southern Black Hills, South Dakota, Possibly Caused by Unexposed Rare-mineral Pegmatite: Issues 885-889
Gratis