Sauer Publication, Sauer Notes on John Gould's Associates, correspondence, 1988 - 1993, Box: 44, Folder: 36-42. 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/206096 Accessed June 17, 2024.