"Philosophy, Ideology and 'Logical Myths'", Proceedings of the XIVth International Congress of Philosophy, vol. I, pp. 463-467, 1968, Box: 13, Folder: 16. Personal papers of Richard T. De George, PP 531. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/315349 Accessed June 13, 2025.