"A Etica de Negociacones e Conflictos nas Relacoes Trabalhistas", Presenca Filosofica, VII, no. 1, January/March, 1981, Box: 13, Folder: 60. 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/315393 Accessed June 13, 2025.