Plan of the revision of lines on city plan no. 215 grades of that portion of the city bounded by Allens Lane, Rural Lane, Gowen Avenue, Lincoln Avenue, Cresheim Valley Drive and McCallum Street. [1 sheet], 1929 May 9, Drawer: W12, Folder: 1. Wissahickon Valley Park Maps, Plans and Drawings, FP.2011.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/49462 Accessed June 08, 2025.