Nature center for Harper's Meadow: site plan, millwork, bridge and stair details (1); elevations, foundation plan, framing plans and elevations (2); level plans, elevations, lower bridge abutment (3); section A-A and D (4); section B-B (5); section C-C, kiosk details (6); lower level and upper level plan details (7); plumbing and electrical (PE); heating, ventilation (HV). [9 sheets], 1969 March 25, Drawer: W1, Folder: 2. Wissahickon Valley Park Maps, Plans and Drawings, FP.2011.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/49135 Accessed April 20, 2025.