Three Raptors - Osprey, Golden Eagle, Bald Eagles - PC-81, ©1991, Box: 5, Folder: 20, 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/310574 Accessed June 15, 2025.