1. Dental caries inhibition by fluorine: the historical perspective;Klein;J Ir Dent Assoc,1972
2. Dental caries in American Indian children;Klein;Public Health Bull,1937
3. Endemic fluorosis and its relation to dental caries;Dean;Public Health Rep,1938
4. Possible relationship between the fluorine content of enamel and resistance to dental caries;Armstrong;J Dent Res,1938
5. Reduction in experimental rat caries by fluorine;Hodge;Proc Soc Expl Biol Med,1939