"Pacific Northwest Region Geological Highway Map California-Nevada" (Produced by the American Association of Petroleum Geologists), undated, Sub-Series 1.5, Box: 6, Folder: 3. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6813 Accessed November 15, 2024.