"John Gould's Prospectuses and Lists of Subscribers to his Works On Natural History: With an 1866 Facsimile" by Gordon C. Sauer, Box: 29, Folder: 1-5. 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/205939 Accessed June 02, 2024.