Darby Corporation Products: “Turtle” Amphibious Landing Craft Tanks WWII, sketches by Frank Miller, June, 1944, Box: 1, Folder: 33. Papers of Harry Darby, RH MS 1345. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/166219 Accessed June 18, 2025.