Polytechnic High School – Hearing on Cancer Risks at Schools: Hearing Notes, Notes, October 1999, id17692, Box: 42, Folder: 3. Tom Hayden Belmont Learning Complex Investigation Collection, URB-BLC. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/91863 Accessed June 10, 2026.