Horizontal boring technology :a state-of-the-art study,

Author:	Paone, James.
Additional Authors:	Bruce, William E.,, Morrell, Roger J.,
Year:	1968
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8392
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8392
Subjects:	Underground electric lines
	Boring
Link:	https://hdl.handle.net/2027/mdp.39015078517078