"John Gould Bird Print Originals and Reproductions" by Gordon C. Sauer, Box: 28, Folder: 57-66. 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/205937 Accessed November 24, 2024.