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2. Planning treatment on the basis of facial pattern and an estimate of its growth;Ricketts;Angle Orthod,1957
3. A principle of archial growth of the mandible;Ricketts;Angle Orthod,1972
4. A simplified approach to prediction;Johnston;Am J Orthod,1975
5. Radiographic evaluation of skeletal maturation: a clinically oriented method based on hand-wrist films;Fishman;Angle Orthod,1982