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1958
Barbat, W. F.. The Los Angeles Basin Area, California In Habitat of Oil. New York: American Association of Petroleum Geologists, 1958.
1953
Hotz, Preston E.. Limonite Deposits near Scappoose, Columbia County, Oregon In U. S. Geological Survey Bulletin. Vol. 982-C. Department of the Interior, 1953.
Moore, Raymond C., and Harold E. Vokes. Lower Tertiary Crinoids from Northwestern Oregon In U. S. Geological Survey Professional Paper. Vol. 233-E. Department of the Interior, 1953.
1946
Smith, H. G.. "The Lamprophyre Problem." Geological Magazine 83, no. 4 (1946): 165-171.
1939
Smith, Warren D., and Wilbur Greenup. "Lakes of Oregon." Northwest Science 13, no. 4 (1939): 75-97.

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