"John Gould The Bird Man: Bibliography 2" by Gordon C. Sauer, early printout, 1995, Box: 33, Folder: 22-34. 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/205972 Accessed July 26, 2024.