Monarch Caterpillar and Chrysalis (Danaus plexippus) - PC-95, ©1992, Box: 5, Folder: 27, item: 6. Natural History Art and Illustration by D. D. Tyler, MS 337. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/310604 Accessed June 16, 2025.