"Needles Desert Access Guide" (Needles, CA: Produced by the U.S. Department of the Interior Bureau of Land Management), undated, Sub-Series 1.3, Box: 6, Folder: 1. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6803 Accessed May 16, 2024.