"Birdscape", Cornell Lab of Ornithology, Vol. 10, No. 2-4; Vol. 11, No. 1-2, 1996 - 1997, Box: 8, Folder: 8. Sauer's Gouldiana Research about John Gould and other papers, MS 304. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/204192 Accessed May 19, 2024.