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Diamond-drilling blast holes, eastern Magnetite Mine A

Diamond-drilling blast holes, eastern magnetite "Mine B"

Published Year

• 1940-1949 (2)

Subject

• Magnetite (2) *
• Boring (1)
• Mines and mineral resources (1)
• Mines and mineral resources--Equipment and supplies (1)
• Rock-drills (1)

Author

• Mosier, McHenry. (2) *

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