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Author: McCulloch, C. M. | Diamond, W. P. | Bench, B. M. | Deul, M.
Title: Selected Geologic Factors Affecting Mining of the Pittsburgh Coalbed.
Coporate: Bureau of Mines, Philadelphia, PA
Report: RI 8093, 1975, 77 p.
Keywords: coal mines | methane | thickness | geology
Identifiers: Pennsylvania; West Virginia