Classification and tabling of difficult ores :with particular attention to fluorspar

Author:	Coghill, William Hawes,
Year:	1929
Document Type:	USBM
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines :
SUDOC:	C 22.5:456
Series:	Technical paper / United States Department of Commerce, Bureau of Mines ;
Report Number:	456
Subjects:	Fluorspar
	Ore-dressing
Link:	https://hdl.handle.net/2027/mdp.39015078542936