John Gould Ornithological Library, "Catalogue of the ornithological library of the late John Gould, esq, F.R.S.", sale catalog, Puttick and Simpson, 1881, Box: 21, Folder: 53. 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/204761 Accessed July 26, 2024.