Progress reports :metallurgical division.

Additional Authors:	Guggenheim, M., DeVaney, F. D., Clemmer, J. B., Duncan, W. E.
Year:	1939
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3437
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	3437
Subjects:	Lead--Illinois
	Zinc--Illinois
	Fluorspar--Illinois
	Flotation
Link:	https://hdl.handle.net/2027/mdp.39015086546879