"Death Valley National Monument" (Death Valley National Park: Produced by the National Park Service U.S. Department of the Interior), 1980, Sub-Series 1.1, Box: 21, Folder: 2. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/10352 Accessed November 15, 2024.