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  1. By: Stevens, W. E. - Scotter, George W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 3
    Date: 1983
    Page Range: 350--353
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Stevens, W. E. - Höhn, E. O.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 72
    Issue: 4
    Date: 1958
    Page Range: 168--170
    Publication Info: Ottawa Ottawa Field-Naturalists' Club