"On the Interrelation of Theoretical and Applied Ethics", Pela Filosofia, Rio de Janeiro, pp. 384-389, 1984, Box: 13, Folder: 72. 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/315405 Accessed June 20, 2025.