Booklet: "A Flock of Beautiful Birds: The Ornithological Collection of Louise Elkins Sinkler", Box: 98, Folder: 13. 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/205377 Accessed July 26, 2024.