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  1. Phytotoxicology background sampling in the city of Windsor: 1972-1986 /
    By: Pearson, R. G. - Ontario. Air Resources Branch. Phytotoxicology Section.
    Publication info: [Toronto] :Phytotoxicology Section, Air Resources Branch,1990.
    Holding Institution: Ontario Ministry of the Environment (archive.org)
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  2. Phytotoxicology investigation in the vicinity of the Brock West Landfill site, Pickering, 1986 /
    By: Pearson, R. G.
    Publication info: [Toronto] :Ontario Ministry of the Environment,1988.
    Holding Institution: Ontario Ministry of the Environment (archive.org)
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