Slide Box 20 - 1959 Southern trip cont'd, Grand Canyon, England trip, cont'd (Peterson Box 19 cont'd, Box 19A), Box: 2, Box: 20. John and Frances Peterson collection, RH MS 1330. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/195553 Accessed January 21, 2025.