Progress report on investigation of detachable rock-drill bits

Author:	Mosier, McHenry.
Year:	1936
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6877
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	6877
Subjects:	Rock-drills
	Drilling and boring
	Bits (Drilling and boring)
Link:	https://hdl.handle.net/2027/mdp.39015077568783