"John Gould the Bird Man: Associates and Subscribers" by Gordon C. Sauer, returned, 1996-02-27, Box: 30, Folder: 9-12. 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/205950 Accessed November 24, 2024.