Dixon, Lois, Conditional Stimulus Control over Choice Responding, HD-11194, Expenditures Report,, 1979, Box: 25, Folder: 25. University of Kansas Schiefelbusch Institute for Life Span Studies records, RG 35. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/452934 Accessed July 12, 2025.