"Birdscape", Cornell Lab of Ornithology, Vol. 9, No. 1-3; Vol. 10, No. 1, 1995 - 1996, Box: 8, Folder: 7. 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/204191 Accessed May 19, 2024.