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Delaware County Institute of Science herbaria collection, 1833-1910 (bulk) 1833-2010 (inclusive)
Held at: Delaware County Institute of Science [Contact Us]
Held at: Delaware County Institute of Science [Contact Us]
Held at: Westtown School Archives [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Chester County Historical Society [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]