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  1. Ontario hardwood decline survey, 1989 and 1990 / report prepared for Phytotoxicology Section, Air Resources Branch, Ontario Ministry of Environment and Energy ; report prepared by BEAK Consultants.
    By: Beak Consultants. - Ontario. Phytotoxicology Section.
    Publication info: Brampton, Ont. :The Section,1993.
    Holding Institution: Ontario Ministry of the Environment (archive.org)
    Subjects: Effect of acid precipitation on  Forest declines  Forest surveys  Hardwoods  Ontario  
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