Author: Wilkinson, W.D. ; Lowry, W.D. ; and Baldwin, E.M.,
Title: Geology of the St. Helens Quadrangle, Oregon, Bulletin No. 31: State Of Oregon, Department of Geology and Mineral Industries.
Description: Portland, Or., Oregon Dept. Geology, 1946. Trade Paperback., Fair in Wraps. Very Worn & Soiled. Prev Notations, Stamps. Inside Cover.

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