VON BERNEWITZ, M. W.
Handbook for prospectors and operators of small mines. Rev. by Harry C. Chellson. 4th ed.
VON BERNEWITZ, M. W. Handbook for prospectors and operators of small mines. Rev. by Harry C. Chellson. 4th ed. © 5Jan43; A170185. McGraw-Hill, Inc. (PWH); 2Jul70; R487617.
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