Block caving at Kelley Mine, the Anaconda Co., Butte, Mont.

Author:	Popoff, C. C.
Year:	1956
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7758
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7758
Subjects:	Copper mines and mining--Montana
	Caving mining
Link:	https://hdl.handle.net/2027/mdp.39015078462853