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  1. 1
    Preliminary stratigraphic cross section showing radioactive zones in the Devonian black shales in eastern Ohio and west-central Pennsylvania /
    by Roen, John B
    Published 1978

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Map
  2. 2
    Stratigraphy and structure of the subsurface Cambrian and Ordovician carbonates of New York /
    by Rickard, Lawrence V
    Published 1973

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  3. 3
    Stratigraphic correlation chart of Pennsylvania /
    Published 1993

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  4. 4
    Stratigraphic correlation chart of Pennsylvania /
    Published 1983

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  5. 5
    Stratigraphy of the Upper Silurian Salina Group, New York, Pennsylvania, Ohio, Ontario
    by Rickard, Lawrence V
    Published 1969

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  6. 6
    Stratigraphy of the subsurface lower and middle Devonian of New York, Pennsylvania, Ohio, and Ontario
    by Richard, Lawrence V
    Published 1989

    Map
  7. 7
    Stratigraphy and structure of the subsurface Cambrian and Ordovician carbonates of New York
    by Rickard, Lawrence V
    Published 1973

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  8. 8
    Stratigraphy of the subsurface lower and middle Devonian of New York, Pennsylvania, Ohio, and Ontario /

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  9. 9
    Greater Pittsburgh region geologic map
    Published 1975

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Map
  10. 10
    Stratigraphy of the subsurface lower and middle Devonian of New York, Pennsylvania, Ohio, and Ontario /
    by Richard, Lawrence V
    Published 1988

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  11. 11
    Stratigraphy of the subsurface Lower and Middle Devonian of New York, Pennsylvania, Ohio, and Ontario /

    Book
  12. 12
    [Blueprints for tunnels along the Pennsylvania turnpike] /
    Published 1938

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  13. 13
    Preliminary stratigraphic cross section showing radioactive zones in the Devonian black shales in eastern Ohio and west-central Pennsylvania /
    by Roen, John B, Roen, John B
    Published 1978

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Map
  14. 14
    Tentative correlation of the named geologic units of Pennsylvania

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