1. Changes in the Human Face Brought About by Development;Hellman;Int. J. Orthodontia,1927
2. Fundamental Principles of a Systematic Diagnosis of Dental Anomalies;Simon,1922
3. A New Technique and Its Application to Orthodontia;Broadbent;Angle Orthodontist,1931
4. The Face of the Normal Child;Broadbent;Angle Orthodontist,1937