Sauer, Gordon C. and Ann Datta. J[ohn] G[ould] correspondence, Box: 9, Folder: 1-7. 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/204587 Accessed November 24, 2024.