Tanik, Abdulsamet, and Mehmet Gül. 2020. “The Validity of the Community Periodontal Index of Treatment Needs (CPITN) in Epidemiological Studies of Periodontal Diseases”. International Dental Research 10 (2): 44-48. https://doi.org/10.5577/intdentres.2020.vol10.no2.3.