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Hill, I.N., Blayney, J.R., and Wolf, W.: The Evanston Dental Caries Study. X. With Progressively Increasing Periods of Exposure to Artificially Fluoridated Water, J. D. Res. 31: 346-353, 1952.
6.
Dean, H.T., Arnold, F.A., Jr., Jay, P., and Knutson, J.R.: Studies on Mass Control of Dental Caries Through Fluoridation of the Public Water Supply, Pub. Health Rep. 43: 1403, 1950 .
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