1. Mandibular plane changes during maxillary traction;Baumrind;Am. J. Orthod.,1978
2. Statistical package for the social sciences;Nie,1974
3. The nature of orthodontic diagnosis;Horowitz,1967
4. Statistical evaluation of cephalometric prediction;Johnston;Angle Orthod.,1968
5. Reliability of head film measurements;Baumrind;Am. J. Orthod,1971