"Mount Diablo State Park" (Walnut Creek, CA; Produced by The Resources Agency Department of State Parks & Recreation), 1970, Sub-Series 2.4, Box: 21, Folder: 1. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/10336 Accessed November 15, 2024.