1. Malocclusion of the Teeth;Angle,1907
2. Fundamental Principles of a Systematic Diagnosis of Dental Anomalies;Simon,1926
3. Applied Orthodontia;McCoy,1931
4. An Interpretation of Angle's Classification of Malocclusion of the Teeth;Hellman;Supported by Evidence From Comparative Anatomy and Evolution, Dental Cosmos,1920