"California's Golden Chain...The Motherlode Highway" (Produced by Creative Lithograph Co.), undated, Sub-Series 1.5, Box: 5, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6797 Accessed November 15, 2024.