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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Addison, R. B. - Williamson, J. C. - Saunders, B. P. - Fraser, D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 94
    Issue: 3
    Date: 1980
    Page Range: 269--276
    Publication Info: Ottawa Ottawa Field-Naturalists' Club