1. Perspectives in the clinical application of cephalometrics. The first fifty years;Ricketts;Angle Orthod,1981
2. A new x-ray technique and its application to orthodontia;Broadbent;Angle Orthod,1931
3. Orthodontics in 3 millennia. Chapter 7: Facial analysis before the advent of the cephalometer;Wahl;Am J Orthod Dentofacial Orthop,2006
4. Evolution of mandibular growth concepts in orthodontic science;Ricketts;Proc Found Orthod Res,1971
5. Philosophies and methods of facial growth prediction;Ricketts;Proc Found Orthod Res,1971