Gould - To the Binder [Note to the book binder regarding the order to bind John Gould's "Humming-birds"], Box: 21, Folder: 1. 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/204723 Accessed June 02, 2024.