Plan and estimate for construction of traffic safety island and signalization at intersection of Rittenhouse Street and Wissahickon Drive. [1 sheet], 1965 March 17, Drawer: W20, W21, & W22, Folder: 3. Wissahickon Valley Park Maps, Plans and Drawings, FP.2011.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/49824 Accessed July 26, 2025.