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  1. By: Clayton, Michael Wilson - Hills, L. V. - Reeves, Brian O. K. - Aaberg, Stephen A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 3
    Date: 1988
    Page Range: 515--522
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Hills, L. V.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 84
    Issue: 4
    Date: 1970
    Page Range: 399--401
    Publication Info: Ottawa Ottawa Field-Naturalists' Club