Experimental longwall mining in a Pennsylvania anthracite mine (in two parts).

Author:	Malenka, Wilbert T.
Additional Authors:	Brennan, Robert J.
Year:	1966
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:6745
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	6745
Subjects:	Anthracite coal--Pennsylvania
	Longwall mining--Pennsylvania
	Mining machinery--Evaluation
	Coal-mining machinery--Evaluation
Link:	https://hdl.handle.net/2027/mdp.39015078525113