1. Moser, C. A., Galees, K., and Morpurgo, P. W R., Dental health and the dental services. Oxford Univ. Press, 1962.
2. Sutton, P. R. N., Fluoridation. Errors and Omissions in Experimental Trials. Melbourne Univ. Press, 2nd edit., 1960.
3. Russell, A. L. and Elvove, E. Domestic water and dental caries, vii. A study of the fluoride-dental caries relationship in an adult population. Publ. Health Rep. 66 : pp. 1389-1401, 1951.
4. Forrest, J. R., Parfitt, G. J. and Bransby, E. R. The incidence of dental caries among adults and young children in three high and three low-fluoride areas in England. Monthly Bulletin Ministry of Health and the Public Health Laboratory Service 10 : pp. 104-111, 1951.
5. Englander, H. R., Reuss, R. C. and Kesel, R. G. Dental caries in adults who consume fluoridated versus fluoride-deficient water. J. Amer. dent. Ass., 68 : pp. 32-37, 1964.