"Andrey Avinoff: A Review of One of the 20th Century's Most Versatile Geniuses", by Lyndra Pate Fox, 1975, Box: 99, Folder: 5. 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/205401 Accessed November 28, 2024.