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Character of drainage from mines in the Thick Freeport coal bed, Pennsylvania

Unwatering flooded coal mines in Washington

Published Year

• 1930-1939 (2) *

Subject

• Mine drainage (2) *
• Coal mines and mining--Washington (State) (1)

Author

• Ash, S. H. (1)
• Leitch, R. D. (1)
• Murphy, Thomas, (1)
• Sayers, R. R. (1)
• Yant, W. P. (1)

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