"City of Porterville and Adjacent Community Area" (Porterville, CA: Produced by Tribune Lithographics), 1977, Sub-Series 1.3, Box: 7, Folder: 2. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6839 Accessed November 15, 2024.