"Twain Harte California" (Twain Harte, CA: Produced by the Twain Harte Chamber of Commerce), 1977, Sub-Series 1.4, Box: 12, Folder: 2. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6983 Accessed November 15, 2024.