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  1. By: Catling, Paul M. - Oldham, Michael J. - Sutherland, D. A. - Brownell, Vivian R. - Larson, Brendon M. H.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 111
    Issue: 3
    Date: 1997
    Page Range: 376--380
    Publication Info: Ottawa Ottawa Field-Naturalists' Club