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  1. By: Bowerman, William W. - Grubb, Teryl G - Bath, Alan J. - Giesy, John P. - Dawson, Gary A. - Ennnis, R. Kenneth
    Type: Article
    In: The Canadian field-naturalist
    Volume: 107
    Issue: 3
    Date: 1993
    Page Range: 273--278
    Publication Info: Ottawa Ottawa Field-Naturalists' Club