"Pluralism, Systems and Philosophical Activity", Philosophers On Their Own Work, v. 9, ed. Andre Mercier and Maja Svilar, Bern/Frankfurt: Peter Lang, pp. 53-85, 1982

"Pluralism, Systems and Philosophical Activity", Philosophers On Their Own Work, v. 9, ed. Andre Mercier and Maja Svilar, Bern/Frankfurt: Peter Lang, pp. 53-85, 1982, Box: 13, Folder: 61. 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/315394 Accessed December 25, 2025.