Letter from Mitchell Zurawinski (Cessna Aircraft Company), August 14, 1944, including attachment with drawings, photograph, photonegatives ("Studies of Stability in Stall"), Box: 5, Folder: 14. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278166 Accessed November 30, 2024.