1. Gray P G, Todd J E, Slack G L, Bulman J S . Adult dental health in England and Wales in 1968. London: HMSO, 1970.
2. Todd J E, Walker A M, Office of Population, Censuses and Surveys. Adult dental health: volume 1, England and Wales 1968–1978. London: HMSO, 1980.
3. Todd J E, Walker A M, Dodd P . Adult dental health: volume 2, UK 1978. London: HMSO, 1982.
4. Todd J E, Lader D . Adult dental health 1988, United Kingdom. London: HMSO, 1988.
5. Kelly M, Steele J, Nuttall N et al. Adult dental health survey: oral health in the United Kingdom in 1998. London: The Stationery Office, 2000.