Bound notarized typescript (cover title: "Soil Press") with pencil drawings, color photographs, and insert dated 2-2-54. Compiled Nov. Dec. 1952, Box: 8, Folder: 1. Russell Randolph Hays papers, RH MS 564. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/278209 Accessed May 08, 2024.