1. Handicapping Malocclusion Assessment Record in direct mouth examination;Allen;Am. J. Orthod.,1970
2. Allen, N. D.: Personal written communication, November, 1971.
3. Classification of malocclusions;Angle;Dent. Cosmos,1899
4. The prevalence and characteristics of malocclusion among senior high school students in upstate New York;Ast;Am. J. Orthod.,1965