1. Malocclusion of the Teeth;Angle,1907
2. The Normal Position of the Maxillary First Permanent Molar;Stoller;Am. J. Orthodontics,1954
3. An Interpretation of Angle's Classification of Malocclusion of the Teeth Supported by Evidence From Comparative Anatomy and Evolution;Hellman;Dental Cosmos,1920
4. Discussion of Milo Hellman's Paper;Strang;Dental Cosmos,1920
5. Fundamentals of Occlusion;Hemley,1944