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You searched for: Format pdf (Portable Document Format) Remove constraint Format: pdf (Portable Document Format) Publisher Pennsylvania Bureau Of Topographic And Geologic Survey Remove constraint Publisher: Pennsylvania Bureau Of Topographic And Geologic Survey
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  1. A Stratigraphic Time Scale

    Resource Type: Book
    Creator: Commonwealth of Pennsylvania and Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:05Z
  2. Silurian Stratigraphy at Lehigh Gap, Pennsylvania

    Resource Type: Book
    Creator: Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:04Z
  3. A Practical Classification of Coals

    Resource Type: Book
    Creator: Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:04Z
  4. Coal Reserves in Jefferson County, Pennsylvania

    Resource Type: Book
    Creator: Sisler, James D.
    Keyword: PAGS Progress Reports
    Location: Jefferson County, Pennsylvania, United States
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:03Z
  5. The Age and Origin of the Earth

    Resource Type: Book
    Creator: Commonwealth of Pennsylvania and Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:03Z
  6. Coal Reserves in Clarion County, Pennsylvania

    Resource Type: Book
    Creator: Sisler, James D.
    Keyword: PAGS Progress Reports
    Location: Clarion County, Pennsylvania, United States
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:02Z
  7. Coal Beds in Northern Somerset County, Pennsylvania

    Resource Type: Book
    Creator: Sisler, James D.
    Keyword: PAGS Progress Reports
    Location: Somerset County, Pennsylvania, United States
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:01Z
  8. Roofing Granules Industry in Southeastern Pennsylvania

    Resource Type: Book
    Creator: Stone, R. W.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:01Z
  9. Volatile Matter in Pennsylvania Coals

    Resource Type: Book
    Creator: Sisler, James D.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:01Z
  10. The Living Earth

    Resource Type: Book
    Creator: Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:01Z