1. Hare’s teeth to fluorides, historical aspects of dentifrice use;Fischman,1992
2. Occurrence of fluorides in some waters of the United States;Churchill;Ind Eng Chem,1931
3. Smith HV, Smith MC. Mottled enamel in Arizona and its correlation with the concentration of fluoride in water supplies. Bull Ariz Agric Exp Stn 1931 no. 32
4. The relation of mottled teeth to caries;McKay;J Am Dent Assoc,1928
5. Mottled teeth;Ainsworth;Br Dent J,1933