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  1. 1
    Geology and mineral resources of the Donegal quadrangle, Pennsylvania /

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  2. 2
    Greensburg quadrangle : mineral resources /
    by Johnson, Meredith E., 1897-
    Published 1925

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  3. 3
    Petrography of the Upper Freeport coal : Harmar and Springdale Mines, Allegheny and Westmoreland Counties, Pennsylvania /
    by Koppe, Edwin F
    Published 1963

    Government Document Book
  4. 4
    Geologic map of the Monongahela quadrangle, southwestern Pennsylvania
    by Roen, John B
    Published 1968

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Map
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