"John Gould The Bird Man: Bibliography 2" by Gordon C. Sauer, 1997, Box: 33, Folder: 35-42. 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/205973 Accessed November 24, 2024.