Resins in coal

Author:	Selvig, W. A.
Year:	1945
Document Type:	USBM
Issuing Agency:	U.S. Govt. Print. Off.,
SUDOC:	I 28.7:680
Series:	Technical paper / United States. Bureau of Mines ;
Report Number:	680
Subjects:	Gums and resins
	Coal--Analysis
Link:	https://hdl.handle.net/2027/mdp.39015078485458