Conveyor systems in underground iron-ore mines, Lake Superior district

Author:	Binyon, Eugene O.
Year:	1949
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7526
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7526
Subjects:	Iron mines and mining--Michigan
	Iron mines and mining--Minnesota
	Conveying machinery
Link:	https://hdl.handle.net/2027/mdp.39015078463836