"John Gould The Bird Man: Bibliography 2" by Gordon C. Sauer, 1993, Box: 32, Folder: 25-46. 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/205966 Accessed July 26, 2024.