Explosive-expansion center-hole anchor

Author:	Parsons, Edward W.
Additional Authors:	Osen, Lars.
Year:	1966
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:6704
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	6704
Subjects:	Boring
	Rock pressure
Link:	https://hdl.handle.net/2027/mdp.39015078525949