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Quisno, R., Gibby, 1. W., and Foter, M.J.: A Neutralizing Mediunr for Evaluating the Germicidal Potency of the Quaternary Ammonium Salts, Am. J. Pharm.118: 320, 1946 .
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Gershenfeld, L., and Brillhart, R.E.: Some Factors Responsible for Irregular Results When Testing Quaternary Ammonium Compounds, Am. J. Pharm. 122: 454, 1950.
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