Arreaga-Mayer, KU#4951, Development and Validation of an Evaluation Instrument, Correspondence, October 6, 1989, Box: 3A, Folder: 5. 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/452298 Accessed May 23, 2025.