Material handling devices for underground mines

Author:	Conway, Ernest J.
Additional Authors:	Unger, Richard L.
Year:	1989
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:9212
Series:	Information circular / Bureau of Mines ;
Report Number:	9212
Subjects:	Coal mines and mining--United States--Safety measures
	Mining machinery--United States
Link:	https://hdl.handle.net/2027/mdp.39015078457788