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Libbey, F. W., W. D. Lowry, and R. S. Mason. Ferruginous Bauxite Deposits in Northwestern Oregon In Department of Geology and Mineral Industries Bulletin. Vol. 29. Oregon Department of Geology and Mineral Industries, 1945.
Libbey, F. W., W. D. Lowry, and R. S. Mason. Preliminary Report on High Alumina Iron Ores in Washington County, Oregon In Department of Geology and Mineral Industries Short Paper. Vol. 12. Oregon Department of Geology and Mineral Industries, 1944.