Large-scale testing of the ripper fragmentation system

Author:	Larson, David A.
Additional Authors:	Swanson, David E., Morrell, Roger J.
Year:	1987
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:9123
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	9123
Subjects:	Quarries and quarrying
	Rock mechanics
	Drag bits (Drilling and boring)--Testing
Link:	https://hdl.handle.net/2027/mdp.39015078480012