Brewster, William. "Descriptions of the First Plumage of Various Species of North American Birds" by William Brewster, 1879, Box: 18, Folder: 4. 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/204633 Accessed November 28, 2024.