Progress reports :metallurgical division.

Author:	Head, R. E.
Year:	1941
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3560
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3560
Subjects:	Manganese ores
	Ore-dressing
Link:	https://hdl.handle.net/2027/mdp.39015078493619