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These investigations were supported through a contract with the Epidemiologic Studies Program, Human Effect Monitoring Branch, Technical Services Division of the Environmental Protection Agency, Washington, D.C. 20460.
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Lee, M.K., Serat, W.F. A simple method for cholinesterase determination using an expanded scale pH meter. Bull. Environ. Contam. Toxicol. 17, 331–341 (1977). https://doi.org/10.1007/BF01686087
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DOI: https://doi.org/10.1007/BF01686087