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