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2. Drinking Water Standards -1962, US Department of Health, Education and Welfare, Public Health Service, Washington, DC 1962, p. 47.
3. Clinical Toxicology of Commercial Product, Accute Poisoning, 3rd ed, The Williams & Wilkins Co, Baltimore 1969, p. 171.
4. The determination of nanomolar levels of nitrite in fresh and sea water by cathodic stripping voltammetry