Typescript and drawings of 1969 test results (in looseleaf binder labeled "Line Pulsators, 1969"). Compiled April 4, 1973, Box: 9, Folder: 9. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278242 Accessed May 06, 2024.