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  1. By: Derksen, Arthur J .
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 3
    Date: 1989
    Page Range: 429--431
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Campbell, Kenneth B. - Derksen, Arthur J . - Remnant, Richard A. - Stewart, Kenneth W
    Type: Article
    In: The Canadian field-naturalist
    Volume: 105
    Issue: 4
    Date: 1991
    Page Range: 568--570
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Prouse, C. Gordon - Derksen, Arthur J .
    Type: Article
    In: The Canadian field-naturalist
    Volume: 88
    Issue: 4
    Date: 1974
    Page Range: 481--481
    Publication Info: Ottawa Ottawa Field-Naturalists' Club