Slide Box 42 - Duplicates: California, Yellowstone, Scandinavia, Washington, etc. (from Peterson's Duplicates Box), Box: 3, Box: 42. John and Frances Peterson collection, RH MS 1330. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/195575 Accessed May 20, 2024.