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Storage of explosives in underground mines of the Lake Superior District
Transportation of iron ore, underground mines, Lake Superior district
Conveyor systems in underground iron-ore mines, Lake Superior district
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Published Year
1940-1949 (3) *
Subject
Iron mines and mining--Michigan (3) *
Iron mines and mining--Minnesota (3)
Iron mines and mining--Wisconsin (2)
Conveying machinery (1)
Mine explosives (1)
Mine haulage (1)
Author
Cash, Frank E. (2)
Binyon, Eugene O. (1)
Johnson, John A. (1)
