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

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