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  1. 1
    The mineral industry of Pennsylvania.
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    Government Document Serial
  2. 2
    Girard estate coal lands in Pennsylvania, 1801-1884 /
    by Hoffman, John N.
    Published 1972
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    Government Document eBook
  3. 3
    Mineral resources of the Elders Ridge quadrangle, Pennsylvania /
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  4. 4
    Economic geology of the Kittanning and Rural valley quadrangles, Pennsylvania /
    by Butts, Charles, 1863-1946
    Published 1906
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    Government Document eBook
  5. 5
    Economic geology of the Beaver Quadrangle, Pennsylvania : (southern Beaver and northwestern Allegheny counties) /
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    Government Document eBook
  6. 6
    Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania /
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    Government Document eBook
  7. 7
    Mineral resources of Johnstown, Pennsylvania and vicinity /
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    Government Document eBook
  8. 8
    Geology and mineral resources of the Quakertown-Doylestown district, Pennsylvania and New Jersey /
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    Government Document eBook
  9. 9
    Geology and mineral resources of the Middletown quadrangle, Pennsylvania /
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    Government Document eBook
  10. 10
    Pre-Cambrian geology and mineral resources of the Delaware Water Gap and Easton quadrangles, New Jersey and Pennsylvania /
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    Government Document eBook
  11. 11
    Geology and mineral resources of the Bellefonte quadrangle, Pennsylvania /
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    Government Document eBook
  12. 12
    Geology and mineral resources of the Butler and Zelienople quadrangles, Pennsylvania /
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    Government Document eBook
  13. 13
    Geology and mineral resources of the Honeybrook and Phoenixville quadrangles, Pennsylvania /
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    Government Document eBook
  14. 14
    Preliminary report on production of anthracite coal.
    Published 1881
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    Government Document eBook
  15. 15
    Coal resources of Butler County, Pennsylvania /
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    Government Document eBook
  16. 16
    Diamond-drill exploration of the Dillsburg magnetite deposits, York County, Pennsylvania /
    by Hotz, Preston Enslow, 1913-
    Published 1951
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  17. 17
    Hydraulic mine filling; its use in Pennsylvania anthracite fields, preliminary report.
    Published 1913
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  18. 18
    Constitution diagrams of Pennsylvania anthracite /
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  19. 19
    Geologic investigation of the Boyertown magnetite deposits in Pennsylvania /
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  20. 20
    Some Structural Features of the Northern Anthracite Coal Basin, Pennsylvania.
    Published 1940
    Electronic resource (PDF)
    Government Document eBook
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