2 prints (inserts from publication "De Bothezat Aeronautical Corporation; its purpose and scope," at RH MS 564:7.19), Box: 1, Folder: 2. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278280 Accessed May 03, 2024.