Sperm Whale (Physeter catadon) from “Whale Watch” by Ada and Frank Graham - PC-28, ©1978, Dell Publishing, Box: 5, Folder: 42, item: 8. 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/310688 Accessed June 18, 2025.