Grizzly Bear (Ursus arctos) from “Bears in the Wild” by Ada & Frank Graham - NC-9, ©1981, Box: 5, Folder: 17, item: 2. 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/310554 Accessed June 24, 2025.