Bureau of mines research and technologic work on coal, 1961

Year:	1963
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines ,
SUDOC:	I 28.27:8167
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	8167
Subjects:	Coal--United States
	Coal--Research
Link:	https://hdl.handle.net/2027/mdp.39015078457002