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Mining methods and costs at the Spring Hill Mine, Montana Mines Corporation, Helena, Mont.

Milling methods and costs at the Spring Hill Concentrator of the Montana Mines Corporation, Helena, Mont.

Mining and milling methods and costs of the Golden Messenger Mine of the United Gold Mines Corporation, York, Mont.

Published Year

• 1930-1939 (3) *

Subject

• Gold mines and mining--Montana (3) *

Author

• A. L. Pierce. (1)
• Grant, L. A. (1)
• Lorain, S. H. (1)

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