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Start Over You searched for: Subject Geology Remove constraint Subject: Geology Year 1900 to 1949 Remove constraint Year: <span class="from" data-blrl-begin="1900">1900</span> to <span class="to" data-blrl-end="1949">1949</span>

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Florence Bascom papers, 1883-1938 (inclusive)

Held at: Bryn Mawr College [Contact Us]

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Weiss family of Weissport, Pennsylvania papers, 1777-1916 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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Horace G. Richards papers, 1928-1984 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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William Wagner lectures, 1815-1905 (inclusive)

Held at: Wagner Free Institute of Science [Contact Us]

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The Lehigh Coal And Navigation Company records, Bulk, 1826-1913 1815-1940

Held at: Lehigh University Special Collections [Contact Us]

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Princeton University Library Collection of Western Americana Photographs, 1870-1915 (bulk) 1840-1998 (inclusive)

Held at: Princeton University Library: Manuscripts Division [Contact Us]

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Harold W. Arndt papers of the Delaware County Institute of Science, Geological and Mineralogical Section, 1938-1942 (inclusive)

Held at: Delaware County Institute of Science [Contact Us]

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Edward Drinker Cope papers, 1859-1907 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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T. Chalkley Palmer natural science teaching collection, circa 1880-1930

Held at: Delaware County Institute of Science [Contact Us]