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Delaware County Institute of Science manuscript collection, 1686-2014 (inclusive)
Held at: Delaware County Institute of Science [Contact Us]
Held at: Delaware County Institute of Science [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Media Historic Archives Commission [Contact Us]
Held at: Marple Historical Society [Contact Us]
Held at: Radnor Historical Society [Contact Us]
Held at: Concord Township Historical Society [Contact Us]