Coal-mining methods and practices and electric power requirements in the Bull Mountain coal field, Montana

Author:	Travis, R. G.
Additional Authors:	Turnbull, Louis A.
Year:	1950
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:4684
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	4684
Subjects:	Coal mines and mining--Montana--Management
	Electricity in mining
Link:	https://hdl.handle.net/2027/mdp.39015078503524