Milling methods and costs at the lead concentrator of the Hecla Mining Co., Gem, Idaho

Author:	Zeigler, William Le Verne,
Year:	1932
Document Type:	USBI
Issuing Agency:	Dept. of Commerce, U.S. Bureau of Mines,
SUDOC:	C 22.11:6600
Series:	United States. Bureau of Mines. Information Circular
Report Number:	6600
Subjects:	Ore-dressing
	Lead ores--Gem (Idaho)
Link:	https://hdl.handle.net/2027/mdp.39015086485326