1. Gray P G, Todd J E, Slack G L, Bulman J S. Adult Dental Health Survey in England and Wales in 1968. London: His Majesty's Stationery Office, 1970.
2. Todd J E, Walker A M. Adult Dental Health: England and Wales 1968-1978. Vol 1. London: His Majesty's Stationery Office, 1980.
3. Todd J E, Walker A M, Dodd P. Adult Dental Health: UK 1978. Vol 2. London: His Majesty's Stationery Office, 1982.
4. Todd J E, Walker A M, Dodd P. Adult Dental Health 1988: United Kingdom. London: His Majesty's Stationery Office, 1988.
5. Kelly M, Steele J, Nuttall N et al. Adult Dental Health Survey: Oral Health in the United Kingdom in 1998. London: The Stationary Office, 2000.