Author: Munro, A.C. ; Pearse, H.A. ; U.S. Department of Commerce, Bureau of Mines,
Title: Milling Methods & Costs at the Concentrator of Britannia Mining & Smelting Co. . . . - Information Circular 6619, May 1932.
Description: Department of Commerce, 1932. Trade Paperback., Vg- in Wraps. Stapled Pages, 2-Hole Punched. Pages: 25. Light Wear & Toning. Brief Notation at Front. Text Block Clean & Tight.

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