Milling methods and costs at the Montana mine concentrator of the Eagle-Picher Lead Co., Ruby, Ariz.

Author:	Andrus, D. E.
Year:	1931
Document Type:	USBI
Issuing Agency:	Dept. of Commerce, U.S. Bureau of Mines,
SUDOC:	C 22.11:6497
Series:	Information circular / Bureau of Mines ;
Report Number:	6497
Subjects:	Lead mines and mining--Arizona
	Silver mines and mining--Arizona
	Zinc mines and mining--Arizona
Link:	https://hdl.handle.net/2027/mdp.39015077576729