"The Built Environment: a Film Festival," Columbia University Graduate School of Architecture and Planning, April 16-20, 1973

"The Built Environment: a Film Festival," Columbia University Graduate School of Architecture and Planning, April 16-20, 1973, Box: HUGO014, Folder: 6. Hugo Leipziger-Pearce collection, HUGO. Alexander Architectural Archives. https://archives.lib.utexas.edu/repositories/2/archival_objects/35630 Accessed September 25, 2026.