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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: Radnor Historical Society [Contact Us]
Held at: Darby Free Library [Contact Us]
Held at: Newtown Square Historical Society [Contact Us]
Held at: Williamson College of the Trades (Williamson Free School of Mechanical Trades) [Contact Us]
Held at: Tinicum Township Historical Society [Contact Us]
Held at: Upper Darby Historical Society [Contact Us]
Held at: Aston Township Historical Society [Contact Us]
Held at: Chester Heights CampMeeting Association [Contact Us]
Held at: Nether Providence Historical Society [Contact Us]