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Search U.S. government technical reports digitized or harvested by TRAIL.
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2 results returnedStorage of explosives in underground mines of the Lake Superior District
Transportation of iron ore, underground mines, Lake Superior district
Published Year
Subject
- Iron mines and mining--Michigan (2)
- Iron mines and mining--Minnesota (2)
- Iron mines and mining--Wisconsin (2) *
- Mine explosives (1)
- Mine haulage (1)
Author
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