"San Bernardino National Forest California" (San Bernardino, CA; Produced by U.S. Department of Agriculture), 1931, Sub-Series 1.4, Box: 21, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/10410 Accessed November 15, 2024.