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  1. By: Bigg, Michael A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 2
    Date: 1988
    Page Range: 307--314
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Bigg, Michael A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 2
    Date: 1988
    Page Range: 315--336
    Publication Info: Ottawa Ottawa Field-Naturalists' Club