1. Nature's Plan and Orthodontics;Hughes;Am. J. Orthodontics and Oral Surg.,1945
2. Heredity and Environment;Conkin,1922
3. The Genetic and Endocrinic Basis for Differences in Form and Behavior;Stockard,1941
4. Studies in Genetics of Interest to the Orthodontist;Johnson;Int. J. Orthodontia,1933