Bibby, B.G., and Van Kesteren, M. : The Effect of Fluorine on Mouth Bacteria, J. D. Res. 19: 391, 1940.
2.
Bibby, B.G.: Use of Fluorine in the Prevention of Dental Caries. II. J. A. D. A. 31: 317, 1944.
3.
Buoncore, M.G. , and Bibby, B.G.: The Effects of Various Ions on Enamel Solubility , J. D. Res. 24: 103, 1945.
4.
Clapper, W.: The Effect of Sodium Fluoride on the Metabolism of Oral Lactobacilli, Proc . Soc. Exper. Biol. & Med. 65: 333, 1947.
5.
Galagan, D.J. , and Knutson, J.W.: Effect of Topically Applied Fluorides on Dental Caries Experience. V. Report of Findings with 2, 4, and 6 Applications of Sodium Fluoride and of Lead Fluoride, U. S. Public Health Reports62: 1477, 1947.
6.
Galagan, D.J. , and Knutson, J.W.: Effect of Topically Applied Fluoride on Dental Caries Experience. VI. Experiments with Sodium Fluoride and Calcium Chloride-Widely Spaced Applications-Use of Different Solution Concentrations, U. S. Public Health Reports63: 1215, 1948 .
7.
Garrett, H.E.: Statistics in Psychology and Education, ed. 3, New York, London, Toronto, 1947, Longmans, Green, and Co., Ch. 7, pp. 197-203, 219.
8.
Hadley, F.P. : Quantitative Method for Estimating Bacillus Acidophilus in the Saliva, J. D. Res. 13: 415, 1933.
9.
Kitchin, P.C. , Robinson, H.B.G., Permar, D., and Imhoff, A.: Observations on Salivary Lactobacillus Counts for a Period Before and After Topical Applications of 2 Per Cent Sodium Fluoride , J. D. Res. 30: 251, 1951.
10.
Klinkenberg, E., and Bibby, B.G.: The Effect of Topical Applications of Fluorides on Dental Caries in Young Adults, J. D. Res. 29: 4, 1950.
11.
Knutson, J.W. , and Armstrong, W.D.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. II. Report of Findings for Second Study Year, U. S. Public Health Reports60: 1085, 1945 .
12.
Knutson, J.W. , and Armstrong, W.D.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. III. Report of Findings for Third Study Year, U. S. Public Health Reports61: 1683, 1946 .
13.
Knutson, J.W. , Armstrong, W.D., and Feldman, F.M.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. IV. Report of Findings with 2, 4, and 6 Applications, U. S. Public Health Reports62: 425, 1947.
14.
Knutson, J.W. : An Evaluation of the Effectiveness as a Caries Control Measure of the Topical Application of Solution of Fluorides, J. D. Res. 27: 340, 1948.
15.
Knutson, J.W. : Sodium Fluoride Solution: Technique for Application to the Teeth, J. A. D. A. 36: 37, 1948.
16.
Muhler, J.C. , and Van Huysen, G.: Sodium Fluoride Reagents Concentration and Powdered Enamel Solubility, J. D. Res. 27: 142, 1948.
17.
Muhler, J.C. , and Van Huysen, G.: Solubility of Enamel Protected by Sodium Fluoride and Other Compounds, J. D. Res. 26: 119, 1947.
18.
Rickles, N. H., and Becks, H.: The Effects of an Acid and a Neutral Solution of Sodium Fluoride on the Incidence of Dental Caries in Young Adults. (In press.)