Review of Bureau of Mines coal program,1969

Author:	Spencer, John D.
Year:	1970
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8479
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	8479
Subjects:	Coal mines and mining
	Coal preparation
	Coal--Research
Link:	https://hdl.handle.net/2027/mdp.39015078514745