(16) Folio - Trochilidae, 5 vol. ["A Monograph of the Trochilidae, or Family of Humming-birds"], Box: 16, Folder: 57. 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/205883 Accessed July 26, 2024.