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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hill, Margaret M. A. - Powell, G. Lawrence. - Russell, Anthony P. (Anthony Patrick),
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 2
    Date: 2001
    Page Range: 241--246
    Publication Info: Ottawa Ottawa Field-Naturalists' Club