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Sinking practice and costs at the Pim Shaft, St. Louis Smelting & Refining Works, National Lead Co., St. Francois, Mo.

Published Year

• 1930-1939 (1)

Subject

• Mineral industries--Missouri (1)
• Mines and mineral resources--Missouri (1)
• Mining engineering--Missouri (1)

Author

• Poston, Roy H. (1) *

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