"Map of Folsom Lake...Lake Natoma...Sacramento-Placer- El Dorado Counties California" (Folsom, CA: Produced by Triumph Press, Inc.), 1970, Sub-Series 1.1, Box: 2, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/6700 Accessed November 15, 2024.