"Joshua Tree" (Joshua tree, CA: Produced by The National Park Service U.S. Department of the Interior), 2008, Sub-Series 1.2, Box: 3, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6722 Accessed November 15, 2024.