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  1. 1
    Guidebook to places of geologic interest in the Lehigh Valley, Pennsylvania /

    Book
  2. 2
    Allentown quadrangle : mineral resources /

    Book
  3. 3
    Zinc ores at Friedensville, Lehigh County, Penna. /

    Book
  4. 4
    Lead and zinc ores in Blair County, Penna. /

    Book
  5. 5
    Lead and zinc ores in Lancaster County, Pennsylvania /

    Book
  6. 6
    Lead and zinc ores near Phoenixville, Chester County, Pennsylvania /

    Book
  7. 7
    Lead and zinc ores in Bucks County, Pennsylvania /

    Book
  8. 8
    Guidebook to places of geologic interest in the Lehigh Valley, Pennsylvania /

    Book
  9. 9
    Lehigh county, Pennsylvania Geology and geography,

    Book
  10. 10
    The mineral pigments of Pennsylvania,

    Book
  11. 11
    Elkton-Wilmington folio : Maryland-Delaware-New Jersey- Pennsylvania /

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Book
  12. 12
    Northampton county, Pennsylvania; geology and geography,

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Book
  13. 13
    Allentown quadrangle : mineral resources, by Benjamin LeRoy Miller /

    Book
  14. 14
    Northampton county, Pennsylvania; geology and geography,

    Book
  15. 15
    Lehigh county, Pennsylvania

    Book
  16. 16
    Allentown quadrangle; mineral resources /

    Book
  17. 17
    Mineral deposits of New Jersey and eastern Pennsylvania;

    Conference Proceeding Book
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