Photocopied and original typescripts of various test results [some notarized] dated 1962 to 1974, separately titled and dated (from envelope labeled "Inventions, 1960-1964"). [, Box: 8, Folder: 15. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278223 Accessed November 23, 2024.