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  1. Assessment of the toxicity of arsenic, cadmium, lead and zinc in soil, plants, and livestock in the Helena Valley for East Helena site (ASARCO), East Helena, Montana.
    By: Asarco Inc. - Black & Veatch. - CH2M Hill, inc. - United States.
    Publication info: Mont.? :U.S. EPA?,1987
    Contributed by: Montana State Library (archive.org)
    Subjects: Effect of heavy metals on  Environmental aspects  Livestock  Montana  Plants  Prickly Pear Creek Valley  Soil pollution  Toxicity testing  
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  2. Phytotoxicology Section investigation in the vicinity of Ethyl Corporation, Corunna, Ontario, August 23, 1989 : report / prepared by Phytotoxicology Section, Air Resources Branch, Ontario Ministry of the Environment.
    By: Ontario.
    Publication info: [Toronto] :The Section,1991.
    Contributed by: Ontario Ministry of the Environment (archive.org)
    Subjects: Air  Corunna  Effect of heavy metals on  Ethyl Corporation  Maple  Measurement  Ontario  Pollution  Vegetation surveys  
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