Author: IRVING, R.D. & C.R. VAN HISE
Title: The Penokee iron-bearing series of Michigan and Wisconsin.
Description: 1890. Reprint: 10th Ann. Rep. US Geol. Surv. Part I; pp. 341-507, 5 figs. 23 plts. h.t. with microphot. (some dol.), geol. sections, and col. geol. map. New wrps. with title shield, orig. front cover included, contents very good, 4to.

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