"In the Humboldt Apple Country" (Humboldt, CA: Produced by Not Available), 1911, Sub-Series 2.2, Box: 15, Folder: 4. Collection of California maps and guidebooks, SC-012. Pfau Library Special Collections. https://archivesspace.csusb.edu//repositories/3/archival_objects/7052 Accessed November 15, 2024.