1. Changes in the Human Face Brought About by Development;Hellman;Int. J. Orthodontia,1927
2. A New X-ray Technique and Its Application to Orthodontia;Broadbent;Angle Orthodontist,1931
3. Orthodontics: Principles and Prevention;Salzmann,1957
4. Orthodontics: Practice and Technics;Salzmann,1957
5. Standard Human Beings Versus Standard Values;Williams;Science,1957