Typescript in looseleaf binder labeled "Lip Coned Resonator Tests, May-June '64," with drawings, also black and white and color photographs of wave generators, Box: 8, Folder: 23. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278231 Accessed May 08, 2024.