Author: Emmons, W., & Calkins, F.C., 1913.:
Title: Geology and ore deposits of the Philipsburg quadrangle, Montana. [U.S. Geol. Surv. Prof. Pap., 78.]
Description: Washington 1913. 4to. Pp. 271, 2 fold. maps in pocket, 15 pls., 55 illus. in text. Paperbound, orig. printed wrappers. Spine neatly mended, good otherwise..

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