1. Biology and Pathology of the Tooth and Its Supporting Mechanism;Gottlieb,1938
2. Nomenclature In Periodontia: (Report of the Committee on Nomenclature of the American Academy of Periodontology—1947)
3. American Text-book of Operative Dentistry;Kirk,1911
4. Diseases of the Soft Structures of the Teeth and Their Treatment;Prinz,1928
5. Factors Affecting the Deposition of Dental Calculus;Smith;Australian J. Dent,1930