"Butte, Sutter & Yuba Counties" (Butte, CA: Produced by Compass Maps Inc.), 1988, Sub-Series 1.1, Box: 1, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6665 Accessed November 15, 2024.