1. Dentition as a Measure of Maturity, Cambridge;Cattell,1928
2. The Process of Dentition and Its Effect on Occlusion;Hellman;Dental Cosmos,1923
3. Physiological Age: The Relation of Dentition to Body Growth;Spier;Dental Cosmos,1918
4. Studies on Dental Caries. II. The Use of the Normal Probability Curve for Expressing the Age Distribution of Eruption of the Permanent Teeth;Klein;Growth,1937
5. Analysis of Half a Million Examinations of Sixth-Year Molars;Green,1935