Plan to revise lines and grades of city plan no. 295 of Ridge Avenue from the traffic interchange at Ridge Avenue, Henry Avenue, and Cathedral Road to the Philadelphia-Montgomery County Line. [1 sheet], 1963 December 2, Drawer: W3 & W4, 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/49200 Accessed April 21, 2025.