United States. General Accounting Office
Kimberly Willis Holt
Robert M. Hodapp
Alfred Binet
Laraine Masters Glidden
Henry Herbert Goddard
American Association on Intellectual and Developmental Disabilities
Alfred Frank Tredgold
Sandra Baum
Unknown Author
Désiré Magloire Bourneville
Carol Sellars
Nick Bouras
George S. Baroff
Ann M. Clarke
Helen McConachie
Tamsin Cottis
Joseph Wortis