Gold Mining and Milling in the United States and Canada: Current Practices and Costs by Charles F. Jackson and John B. Knaebel. U.S Department of Commerce, Bureau of Mines Bulletin 363

Gold Mining and Milling in the United States and Canada: Current Practices and Costs by Charles F. Jackson and John B. Knaebel. U.S Department of Commerce, Bureau of Mines Bulletin 363

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Washington, D.C.: Government Printing Office, 1932. Softcover. 8vo. Very good. Photographic illustrations throughout. Index, 151 pages. SCI/082223
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