"John Gould's Partridges of America with Biographical and Biological Notes", Gordon C. Sauer and Paul A. Johnsgard, Box: 43, Folder: 20-28. 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/206078 Accessed November 24, 2024.