Basic estimated capital investment and operating costs for underground bituminous coal mines :mines with annual production of 1.03 to 3.09 million tons from a 48-inch coalbed : revision of Information circular 8641

Author:	Katell, Sidney.
Additional Authors:	Hemingway, E. L.,, Berkshire, L. H.,
Year:	1975
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines :
SUDOC:	I 28.27:8689
Series:	Information circular - Bureau of Mines ;
Report Number:	8689
Subjects:	Coal mines and mining--United States--Cost of operation
	Bituminous coal--Costs
Link:	https://hdl.handle.net/2027/mdp.39015078463299