"John Gould the Victorian Bird Man: A Chronology and Bibliography" by Gordon C. Sauer, 1978 - 1979, Box: 37, Folder: 6-16. 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/206016 Accessed June 26, 2024.