1. Prevention of periodontal disease in the dental office;Ainamo;International Dental Journal,1984
2. Development of the World Health Organization (WHO) community periodontal index of treatment needs (CPITN);Ainamo;International Dental Journal,1982
3. American Dental Association (ADA) & the American Academy of Periodontology (AAP) (1992) Periodontal screening and recording: an early detection system. The media kit produced by American Dental Association and the American Academy of Periodontology, and sponsored by The Procter & Gamble Company.