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  • McCulloch, C. M.; Diamond, W. P.; Bench, B. M.; Deul, M.
    view article (10.004545)

    Selected Geologic Factors Affecting Mining of the Pittsburgh Coalbed.
    Bureau of Mines, Philadelphia, PA
    RI 8093, 1975, 77 p.

  • Diamond, W. P.; Oyler, D. C.; Fields, H. H.
    view article (9.9981365)

    Directionally Controlled Drilling to Horizontally Intercept Selected Strata, Upper Freeport Coalbed, Greene County, PA.
    Bureau of Mines, Pittsburgh, PA
    RI 8231, 1977, 24 p.