Effects of fluoride level in drinking water, nutritional status, and socio-economic status on the prevalence of developmental defects of dental enamel in permanent teeth in Saudi 14-year-old boys. - Rugg-Gunn AJ; Al-Mohammadi SM; Butler TJ; Rugg-Gunn, A J; al-Mohammadi, S M; Butler, T J (Caries Research, 1997)