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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. Hazardous Site Control Division.
    Publication info: Mont.? :U.S. EPA?,1987
    Holding Institution: Montana State Library (
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