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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Gizyn, W. I.
    Publication info: [Toronto], Environment Ontario, [1991]
    Holding Institution: Ontario Ministry of the Environment
  2. By: Gizyn, W. I. - Ontario. Ministry of the Environment. Phytotoxicology Section.
    Publication info: [Toronto], Standards Development Branch, Phytotoxicology Section, Ontario Ministry of Environment and Energy, 1994
    Holding Institution: Ontario Ministry of the Environment