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1942
Libbey, F. W., J. E. Allen, Ray C. Treasher, and H. K. Lancaster. Manganese in Oregon In Department of Geology and Mineral Industries Bulletin. Vol. 17. Oregon Department of Geology and Mineral Industries, 1942.
1940
Treasher, Ray C.. Field Identification of Minerals for Oregon Prospectors and Collectors In Department of Geology and Mineral Resources Bulletin. Vol. 16. Oregon Department of Geology and Mineral Industries, 1940.