1. Principles of Orthodontics;Salzmann,1950
2. Diagnosis in Orthodontics: Theory and Practice;Salzmann;Am. J. Orthodontics and Oral Surg.,1942
3. Variation in Occlusion;Hellman;Dental Cosmos,1921
4. The Meaning of the Normal;Johnson;Boston M. & S. J.,1920
5. Basic Principles of Orthodontia;Johnson;Dental Cosmos,1923