J. Clark and Henrietta (Sheppard) Cox from E. Beth Cox, 1979-1980 (March-July), Box: 11, Folder: 31. Cooper-Sheppard-Cox family papers, RH MS 576. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/159303 Accessed January 17, 2025.