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A study of roof in Pennsylvania mines contiguous to Monongahela River

Tests on the effect of acid mine waters on various cements

Published Year

• 1930-1939 (1)
• 1940-1949 (1)

Subject

• Coal mines and mining--Pennsylvania--Pittsburgh (1)
• Water--Pollution (1)

Author

• Calverley, J. G. (2) *
• Leitch, R. D. (1)
• Paul, J. W. (1) *

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