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Graceanna Lewis natural history papers, 1869-1890 (bulk) 1869-2006 (inclusive)
Held at: Delaware County Institute of Science [Contact Us]
Held at: Delaware County Institute of Science [Contact Us]
Held at: Morris Arboretum Archives [Contact Us]
Held at: Morris Arboretum Archives [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Delaware County Institute of Science [Contact Us]