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Showing 1 - 1 results of 1 for search '(("Coal mines and mining Pennsylvania.") OR ("Coal lines and mining Pennsylvania."))', query time: 0.24s Refine Results
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    Strata interactions in multiple-seam mining--two case studies in Pennsylvania /
    by Chekan, G. J. (Gregory J.)
    Published 1986
    Subjects: “...Coal mines and mining Pennsylvania....”
    Government Document Book
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