(4) Folio - Trogonidae 1st ["A Monograph of the Trogonidae, or Family of Trogons"], 1835 - 1838, Box: 16, Folder: 45. 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/205872 Accessed November 24, 2024.