The Individualization Barrier of Secondary Education, Stewart and A. Turnbull in The Directive Teacher, Volume 2, Number 4, Spring 1980

The Individualization Barrier of Secondary Education, Stewart and A. Turnbull in The Directive Teacher, Volume 2, Number 4, Spring 1980, Box: 1, Folder: 100. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304853 Accessed December 25, 2025.