Showing 1 - 14 results of 14 for search 'Ashley, Geo. H. (George Hall), 1866-1951', query time: 0.35s Refine Results
  1. 1
    The undeveloped mineral resources of Pennsylvania /
    Book
  2. 2
    The oil and gas fields of Pennsylvania /
    Book
  3. 3
    A syllabus of Pennsylvania geology and mineral resources /
    Book
  4. 4
    The scenery of Pennsylvania : its origin and development based on recent studies of physiographic and glacial history /
    Book
  5. 5
    Geology and mineral resources of part of the Cumberland Gap coal field, Kentucky /
    Government Document Book
  6. 6
    Oil resources of black shales of the Eastern United States /
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    Government Document eBook
  7. 7
    Cannel coal in the United States /
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    Government Document eBook
  8. 8
    Rhode Island coal /
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    Government Document eBook
  9. 9
    The valuation of public coal lands : the value of coal land /
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    Government Document eBook
  10. 10
    Geology and mineral resources of part of the Cumberland Gap coal field, Kentucky /
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    Government Document eBook
  11. 11
    Geologic atlas of U.S : Ditney folio, Indiana.
    Published 1902
    Other Authors: “...Ashley, Geo. H. (George Hall), 1866-1951...”
    Connect to the full text of this electronic document
    Government Document eBook
  12. 12
    Bituminous coal fields of Pennsylvania.
    Published 1925
    Other Authors: “...Ashley, Geo. H. (George Hall), 1866-1951...”
    Book
  13. 13
    Bituminous coal fields of Pennsylvania /
    Published 1926
    Other Authors: “...Ashley, Geo. H. (George Hall), 1866-1951...”
    Book
  14. 14
    Contributions to oil and gas geology of western Pennsylvania /
    Other Authors: “...Ashley, Geo. H. (George Hall), 1866-1951...”
    Book
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