Polytechnic High School – Senator Hayden Sets Hearing on Reported Cancer Risks at LAUSD Schools: Press Release, Invitation Letters, 1999 October 15-22, id17697, Box: 42, Folder: 8. Tom Hayden Belmont Learning Complex Investigation Collection, URB-BLC. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/91868 Accessed June 10, 2026.