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2. Bolton standards of dentofacial development growth;Broadbent,1975
3. An assessment of the occlusion of teeth of children 12-17 years. DHEW pub No (HRA) 74-1612;Kelly,1973
4. Malocclusion and facial morphology;Siriwat;Angle Orthod,1985
5. Longitudinal changes in facial type in cases with vertical and horizontal growth directions;Lundström;Eur J Orthod,1983