Morony, John J, Walter J. Bock, and John Farrand. "Reference List of the Birds of the World". New York: Department of Ornithology, American Museum of Natural History, 1975, Box: 98, Folder: 33. 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/205390 Accessed July 26, 2024.