Basic estimated capital investment and operating costs for underground bituminous coal mines :mines with annual production of 1.06 to 4.99 million tons from a 72-inch coalbed

Author:	Katell, Sidney.
Additional Authors:	Hemingway, E. L.,, Berkshire, L. H.,
Year:	1975
Document Type:	USBI
Issuing Agency:	Bureau of Mines,
SUDOC:	I 28.27:8682
Series:	Information circular - Bureau of Mines ;
Report Number:	8682
Subjects:	Coal mines and mining--United States--Cost of operation
	Bituminous coal--Costs
Link:	https://hdl.handle.net/2027/mdp.39015078462192