"Mower-Press Hay Processing Machine, 3/18/43." [notarized typescript with drawings and inserted tearsheet from Country Gentleman, April 1943, p. 27: "Short-Cuts in Haymaking"], Box: 6, Folder: 18. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278186 Accessed May 03, 2024.