Investigation of Twin Buttes copper mines, Pima County, Ariz.

Author: Cummings, Joseph B.
Additional Authors: Romslo, T. M.
Year: 1950
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:4732
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 4732
Subject: Copper mines and mining--Arizona--Pima County
Link: https://hdl.handle.net/2027/mdp.39015078488544

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