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Lead and zinc mining and milling in the United States :current practices and costs

Published Year

• 1930-1939 (1)

Subject

• Lead mines and mining--United States (1)
• Ore-dressing (1) *
• Zinc mines and mining--United States (1) *

Author

• Jackson, Charles Freeman, (1) *
• Knaebel, John Ballantine, (1)
• Wright, Chilton Austin, (1)

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