"Helicopter Route Chart Los Angeles" (Los Angeles, CA: Produced by the U.S. Department of Transportation), 2005, Sub-Series 1.2, Box: 4, Folder: 3. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6759 Accessed November 15, 2024.