Methods of mining at the Black Rock Mine, Butte & Superior Mining Co., Butte District, Mont.

Author: McGilvra, D. B.
Additional Authors: Healy, A. J.
Year: 1930
Document Type: MAIN
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6370
Series: Information circular / United States Department of Commerce, Bureau of Mines ;
Report Number: 6370
Subject: Zinc mines and mining--Montana--Butte
Link: https://hdl.handle.net/2027/mdp.39015095084714

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