1. Orthodontics, Principles and Practice;Graber,1972
2. Growth and Class II treatment;Coben;Am. J. Orthod.,1966
3. Statistical Methods for Research Workers;Fisher,1946
4. An approach to the treatment of Class II malocclusion;Bernstein;Am. J. Orthod.,1974
5. Growth behavior of the human bony facial profile as revealed by serial cephalometric roentgenology;Lande;Angle Orthod.,1952