Fluorspar mining methods and costs, Ozark-Mahoning Co., Hardin County, Ill.

Additional Authors:	Powell, E., Bailie, Harold., Myslinski, F. J., Melcher, William.
Year:	1960
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7984
Series:	Information circular / Bureau of Mines ;
Report Number:	7984
Subjects:	Geology--Illinois
	Fluorspar--Illinois--Hardin County
Link:	https://hdl.handle.net/2027/mdp.39015078460741