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Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pa.
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Published Year
1970-1979 (1)
Subject
Coal mines and mining--Pennsylvania (1)
Coal--Geology--Pennsylvania (1)
Firedamp (1) *
Author
Iannacchione, Anthony. (1)
Puglio, D. G. (1) *
