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  1. By: Harris, Robert D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 75
    Issue: 3
    Date: 1961
    Page Range: 162--163
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Sugden, Lawson G - Thurlow, William J. - Harris, Robert D. - Vermer, Kees
    Type: Article
    In: The Canadian field-naturalist
    Volume: 88
    Issue: 3
    Date: 1974
    Page Range: 303--311
    Publication Info: Ottawa Ottawa Field-Naturalists' Club