A Method for Assessing the Sanitizing Efficiency of Quaternary Ammonium and Hypochlorite Products C. K. Johns CopyRight*Presented before the Laboratory Section of the American Public Health Association, at the Seventy-fourth Annual Meeting in Cleveland, Ohio, November 12, 1946. Contribution No. 247 (Journal Series) from the Division of Bacteriology and Dairy Research, Science Service, Department of Agriculture, Ottawa, Canada. https://doi.org/10.2105/AJPH.37.10.1322 Published Online: August 29, 2011
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