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  • Oyler, D. C.
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    Use of a Sodium Silicate Gel Grout for Plugging Horizontal Methane-Drainage Holes.
    Bureau of Mines, Pittsburgh, PA
    RI 8843
    RI 8843
    1984
    23 p.

  • Diamond, W. P.; Oyler, D. C.; Fields, H. H.
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    Directionally Controlled Drilling to Horizontally Intercept Selected Strata, Upper Freeport Coalbed, Greene County, PA.
    Bureau of Mines, Pittsburgh, PA
    RI 8231
    RI 8231
    1977
    24 p.