"Pomona- Ontario Area" (Pomona, CA: Produced by the Automobile Club of Southern California), 1993, Sub-Series 1.3, Box: 7, Folder: 2. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6838 Accessed November 15, 2024.