"Sonora...California's Beautiful Sierra Foothills...The City of History & Progress" (Sonora, CA: produced by the Tuolumne County Chamber of Commerce), 1977, Sub-Series 1.4, Box: 11, Folder: 3. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6962 Accessed November 15, 2024.