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  1. By: Laidre, Kristin L. - Heide-Jorgensen, Mads-Peter - Orr, Jack R.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 120
    Issue: 4
    Date: 2006-10-01
    Page Range: 457--465
    Publication Info: Ottawa Ottawa Field-Naturalists' Club