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Concentration of the rake discharge from a bowl classifier in a washing plant of the Mesabi Range, Minnesoda

Published Year

• 1930-1939 (1)

Subject

• Coal mines and mining--Minnesota (1)
• Coal washing (1) *
• Ore-dressing (1) *

Author

• Coghill, W. H. (1)
• DeVaney, F. D. (1)

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