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2.
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4.
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5.
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7.
Hemmens, E.S. , Blayney, J.R., Bradel , S.F., and Harrison , R.W.: The Microbic Flora of the Dental Plaque in Relation to the Beginning of Caries, J. D. Res. 25: 195, 1946.
8.
Stephan, R.M. : Intra-Oral Hydrogen-Ion Concentrations Associated With Dental Caries Activity, J. D. Res. 23: 257, 1944.
9.
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10.
Green, G.E. , and Dodd, M.C.: Microorganisms from Saliva of Caries-Free and Caries-Susceptible Human Beings, J. D. Res . 32: 651, 1953 (Abst.).
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12.
Hadley, F.P. , and Bunting, R.W.: Quantitative Method for Recognizing B. Acidophilus in Saliva, J. D. Res. 13: 198, 1933.
13.
Davies, G.N. , Slack, G.L., and Tilden, E.B.: A Medium for the Differentiation of Strongly Acidogenic From Weakly Acidogenie Organisms , J. D. Bes. 27: 149, 1948.