Correspondence: Fred (Gus) Gustafson and Barbara Hays Duke, 1989-1990 [2 original Gustafson letters; draft of Duke letter], Box: 10, 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/278268 Accessed November 23, 2024.