"John Gould The Bird Man: Bibliography 2" by Gordon C. Sauer, 1994, Box: 32, Folder: 47-58. 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/205967 Accessed November 28, 2024.