"National Forests of the California Region" (California and Southwestern Nevada) (Produced by the U.S. Department of Agriculture Forest Service), 1940, Sub-Series 1.5, Box: 22, Folder: 3. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/15219 Accessed January 10, 2026.