1. Research related to malocclusion;Moorrees;Am. J. Orthod.,1971
2. A system for identifying and scoring occlusal disorders: The occlusal index;Summers,1966
3. An assessment of the occlusion of the teeth of children 6–11 years, United States, data from the National Health Survey;Kelly,1973
4. An assessment of the occlusion of the teeth of youths 12–17 years, United States, Vital and Health Statistics: Series 11, Data from the National Health Survey, No. 162;Kelly,1977