Bound notarized typescript (cover title: "Humidity Picture; title page: "Colorimetric Humidity Indicator Notes") with color photographs and painted color sample on plastic insert. Compiled Nov. Dec. 1952; bound 1953, Box: 8, Folder: 2. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278210 Accessed November 23, 2024.