Centennial: Westcott, Thompson. 1876. Centennial portfolio a souvenir of the International Exhibition at Philadelphia, comprising lithographic views of fifty of its principal buildings, with letter-press description. Philadelphia: T. Hunter. [Ryerss library copy], 1876, Case: Rare Book Cabinet, Shelf: 1. Books and Bound Manuscripts, FP.2016.004. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/13714 Accessed June 09, 2025.