Rodriguez, F.E. : Method of Determining Quantitatively the Incidence of L. acidophilusodontolyticus in the saliva, J. A. D. A. 17: 1711, 1930; Ibid. 18: 2118, 1931.
2.
Kulp, W.L., and White, V.: A Modified Medium for Plating L. acidophilus, Science76: 17, 1932.
3.
Hadley, F.P. : A Quantitative Method for Estimating Bacillus acidophilus in Saliva, J. D. Res. 13: 415, 1933.
4.
Hadley, F.P. , and Bunting, R.W.: Further studies on the Recognition of B. acidophilus, J. A. D. A. 19: 28, 1934.
5.
Davies, G.N. , Slack, G.L., and Tilden, E.B.: A Medium for the Differentiation of Strongly Acidogenic From Weakly Acidogenic Organisms of Human Saliva, J. D. Res. 27: 149, 1948.
6.
Wade, W.E., Smiley, K.L., and Boruff, C.S.: Improved Method for Differentiating Acid-forming From Non-acid-forming Bacteria , J. Bact. 51: 787, 1946.
7.
Arnold, F.A. : Role of Fluorides in Preventive Dentistry, J..A. D. A. 30: 499, 1943.
8.
Rizzo, D.R.: Studies of the Number of Strongly Acidogenic Bacteria in Saliva and Their Relation to Dental Caries, Thesis, Northwestern University , 1950.
9.
Hemmens, E.S. , Blayney, J.R., and Harrison , R.W.: The Microbic Flora of Bacterial Plaques Removed From Carious and Non-carious Dental Enamel, J. D. Res. 20: 29, 1941.
10.
Bibby, B.G. , Volker, J.F., and Van Kesteren , M.: Acid Production and Tooth Decalcification by Oral Bacteria, J. D. Res. 21: 61, 1942.
11.
Rogosa, M., Mitchell, J.A., and Wiseman, R.F.: A Selective Medium for the Isolation and Enumeration of Oral Lactobacilli , J. D. Res. 30: 682, 1951.
12.
Stephan, R.M. , and Hemmens, E.S.: Changes in pH Produced by Pure Cultures of Oral Microorganisms, J. D. Res. 26: 15, 1947.
13.
De Jong, den D., Thesis, 1926 (see pages 802-809 of Porter's Bacterial Chemistry and Physiology, Tables 1 to 7, Wiley, 1946).
