Mining methods and costs at the Pilares mine, Pilares de Nacozari, Sonora, Mexico

Author: Leland, Everard.
Year: 1930
Document Type: USBI
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6307
Series: Information circular / Bureau of Mines ;
Report Number: 6307
Subject: Mining engineering--Mexico
Link: https://hdl.handle.net/2027/mdp.39015077576232

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