Hot milling of rock-drill bits at the mines of the Vinegar Hill Zinc Co., Platteville, Wis.

Author:	Agnew, Wing G.
Year:	1936
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6907
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	6907
Subjects:	Rock-drills
	Zinc mines and mining--Wisconsin
	Bits (Drilling and boring)
	Drilling and boring
Link:	https://hdl.handle.net/2027/mdp.39015077569658