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  1. By: Beak Consultants. - Ontario. Phytotoxicology Section.
    Publication info: Brampton, Ont, The Section, 1993
    Holding Institution: Ontario Ministry of the Environment
    Subjects: Effect of acid precipitation on  Forest declines  Forest surveys  Hardwoods  Ontario  
  2. By: Ward, Jeffrey S. - Connecticut Agricultural Experiment Station.
    Publication info: New Haven, Connecticut Agricultural Experiment Station, [2005]
    Holding Institution: University of Connecticut Libraries
    Subjects: Connecticut  Defoliation  Forest declines  Forest health