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2.
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Frostell, G. , and Blomberg, R.R.Quantitative Determination of Lactic Acid Production in Suspensions of Plaque Material, Svensk. Tandlah. Tskr., 50:407, 1957. As quoted in D. Abstr. 4:39.
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Forscher, B.K. , and Hess, W.C.The Validity of Plaque pH Measurements as a Method of Evaluating Therapeutic Agents, J.A.D.A., 48:134, 1954.
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