Risley, Todd, Urban Recreation as a Tool for Community Betterment, January 31, 1972, Box: 67, Folder: 27. 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/455579 Accessed May 20, 2025.