Longwall mining with a German coal planer :Pocahontas No. 3 coalbed, Keystone, W. Va.

Author:	Harper, D. S.
Additional Authors:	Carman, C. O.
Year:	1963
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior. Bureau of Mines,
SUDOC:	I 28.23:6291
Series:	Report of investigations / Bureau of Mines ;
Report Number:	6291
Subjects:	Coal--West Virginia
	Coal-mining machinery
Link:	https://hdl.handle.net/2027/mdp.39015077556572