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  1. By: Wilk, Randall J. - Solberg, John W. - Berns, Vernon D. - Sellers, Richard A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 3
    Date: 1988
    Page Range: 541--543
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Berns, Vernon D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 83
    Issue: 4
    Date: 1969
    Page Range: 404--405
    Publication Info: Ottawa Ottawa Field-Naturalists' Club