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  1. By: Ballard, Warren B - Whitlaw, Heather A. - Sabine, Dwayne L. - Jenkins, Roger A. - Young, Steven J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 112
    Issue: 2
    Date: 1998
    Page Range: 254--261
    Publication Info: Ottawa Ottawa Field-Naturalists' Club