"A Map of the Marked Historical Sites of California" (Produced by the California State Department of Natural Resources and WestWays), 1952, Sub-Series 1.5, Box: 22, Folder: 1. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/15206 Accessed January 09, 2026.