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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Montevecchi, W A - Blundon, E. - Coombes, G. - Porter, J. M. - Rice, P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 92
    Issue: 1
    Date: 1978
    Page Range: 80--82
    Publication Info: Ottawa Ottawa Field-Naturalists' Club