Shelter, toilet and guard houses, Lincoln Drive and Wissahickon Drive: cross section of storage room, frame details, cross section thru shelter, north elevation, west elevation, Wissahickon Drive elevation (south), and Lincoln Drive elevation (east) [2 sheets; 1 unique sheet], 1939 January 24, Drawer: Wissahickon General, 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/49033 Accessed April 20, 2025.