"Visiting the Mother Lode of California" (Produced by the Touring Bureau Automobile Club of Southern California), undated, Sub-Series 2.5, Box: 16, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/7094 Accessed November 15, 2024.