Accident prevention in the mines of Butte, Montana

Author:	Harrington, D.
Year:	1920
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I28.7:229
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	229
Subjects:	Mine safety
	Copper mines and mining--Montana
Link:	https://hdl.handle.net/2027/mdp.39015077560590