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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hall, John Christopher. - Ontario. Ministry of the Environment. Research and Technology Branch.
    Publication info: [Toronto, Ont.], Environment Ontario, c1990
    Holding Institution: Ontario Ministry of the Environment
  2. By: McMaster, M. E. - Ontario. Ministry of the Environment. Research and Technology Branch.
    Publication info: [Toronto], Environment Ontario, [1991]
    Holding Institution: Ontario Ministry of the Environment
  3. By: Ontario. Environmental Research Program. - Ontario. Ministry of the Environment. Research and Technology Branch. - Ontario. Ministry of the Environment. Research Management Office.
    Publication info: [Toronto], Ontario, Ministry of the Environment, 1987-
    Holding Institution: Ontario Ministry of the Environment