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Water problem in the Pennsylvania anthracite mining region
Backfilling problem in the anthracite region as it relates to conservation of anthracite and prevention of subsidence
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Published Year
1940-1949 (2)
Subject
Anthracite coal--Pennsylvania (2) *
Coal mines and mining--Pennsylvania (2)
Mine drainage (1)
Mining engineering (1)
Subsidences (Earth movements) (1)
Author
Ash, S. H. (2) *
Westfield, James. (1)
