National Easter Seal Society Convention Committee, Portland Hilton Hotel, Portland, Oregon, Saturday, November 13, 1971-72, 1971 - 1972, Box: 29, 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/446364 Accessed July 17, 2025.