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2.
Pearlman, S. : The Action of Ammonia Salts on Lactobacillus Acidophilus (4646), J. D. Res. 28: 638, 1949.
3.
Bibby, B.G.: A Test of the Effect of Fluoride-Containing Dentifrices on Dental Caries, J. D. Res. 24: 297, 1945.
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Day, C.D.M. , and Sedwick, H.J.: Studies on the Incidence of Dental Caries, D. Cosmos77: 442, 1935.
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East, B.R., and Pohlen, K.: Health Index of Teeth, J. D. Res. 20: 533, 1941.
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Sloman, E.: Sex and Age Factors in the Incidence of Dental Caries, J. A. D. A. 28: 441, 1941.
7.
Bödecker, C.F. , and Bodecker, H.W.C.: A Practical Index of the Varying Susceptibility to Dental Caries in Man, D. Cosmos73: 707, 1931.
8.
Hyatt, T.P.: How Dental Statistics Are Secured in the Metropolitan Life Insurance Company , J. D. Res. 9: 411, 1929.
9.
Klein, H., and Palmer, C.E.: The Prevalence and Incidence of Dental Caries Experience, Dental Care, and Carious Defects Requiring Treatment in High School Children, Public Health Reports55: 1258, 1940.
10.
Wessels, K.E. , and Cheyne, V.D.: A Determination of the Number of Surfaces Involved in Carious Extracted Teeth, J. D. Res. 26: 375, 1947.
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Fosdick, L.S. : The Reduction of the Incidence of Dental Caries. I. Immediate Tooth Brushing with a Neutral Dentifrice, J. A. D. A. 40: 133, 1950.
