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You searched for: Creator George H Ashley Remove constraint Creator: George H Ashley Format pdf (Portable Document Format) Remove constraint Format: pdf (Portable Document Format) Object Type Generic Work Remove constraint Object Type: Generic Work Publisher Pennsylvania Bureau Of Topographic And Geologic Survey Remove constraint Publisher: Pennsylvania Bureau Of Topographic And Geologic Survey
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  1. The Possibility of Oil and Gas from Deeper Drilling in Western Pennsylvania

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:37Z
  2. The Origin of Pennsylvania Coal

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:37Z
  3. Future Use of Raw Coal

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:37Z
  4. Development and Probable Life of Gas Pool at McKeesport, Pennsylvania

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:36Z
  5. A High-Grade Building Stone in Greene County

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:36Z
  6. Decline of McKeesport Gas Pool

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:36Z
  7. Oil and Gas in Southeast Pennsylvania

    Resource Type: Book
    Creator: George H. Ashley
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T23:19:36Z
  8. Gas in the Tioga Region, Pennsylvania

    Resource Type: Book
    Creator: George H. Ashley and Stanley H. Cathcart
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:16Z
  9. The Topographic and Geologic Survey: A Brief Summary of its Work since 1919

    Resource Type: Book
    Creator: Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:10Z
  10. Mineral Resources of the Lower Allegheny - Beaver River District

    Resource Type: Book
    Creator: Ashley, George H.
    Keyword: PAGS Progress Reports
    Publisher: Pennsylvania Bureau of Topographic and Geologic Survey
    Object Type: GenericWork
    Date Uploaded: 2014-09-25T00:39:07Z