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  1. 1
    Geologic map of the Hellertown quadrangle, Northampton, Bucks, and Lehigh counties, Pennsylvania

    Geologic map of the Hellertown quadrangle, Northampton, Bucks, and Lehigh counties, Pennsylvania

    Published 1996
    Subjects: “…Geology Pennsylvania Northampton County Maps.…”
    Government Document Map
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  2. 2
    Geologic map of the Catasauqua quadrangle, Northampton and Lehigh counties, Pennsylvania

    Geologic map of the Catasauqua quadrangle, Northampton and Lehigh counties, Pennsylvania by Drake, Avery Ala, 1927-

    Published 1996
    Subjects: “…Geology Pennsylvania Northampton County.…”
    Government Document Microfilm Book
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  3. 3
    Geologic map of the Nazareth quadrangle, Northampton County, Pennsylvania

    Geologic map of the Nazareth quadrangle, Northampton County, Pennsylvania

    Published 1997
    Subjects: “…Geology Pennsylvania Northampton County Maps.…”
    Government Document Microfilm Map
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