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  1. Acute and chronic toxicity to zooplankton of pure pentachlorophenol and a technical formulation : laboratory and field studies / prepared for Environment Ontario by Gladys L. Stephenson and Narinder K. Kaushik.
    By: Stephenson, Gladys L. - Kaushik, N. K. - Ontario.
    Publication info: [Toronto] :Queen's Printer for Ontario,c1991.
    Contributed by: Ontario Ministry of the Environment (archive.org)
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