Fathers and family-centered early intervention, Turbville, A. Turnbull, H.R. Turnbull in Infants and Young Children, Volume 7, Number 4, April 1995, Box: 1, Folder: 10. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304763 Accessed June 25, 2025.