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  1. By: Nette, Tony - Burles, Doug - Hoefs, Manfred
    Type: Article
    In: The Canadian field-naturalist
    Volume: 98
    Issue: 2
    Date: 1984
    Page Range: 252--254
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Hoefs, Manfred - Hoefs, Hannelore - Burles, Doug
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 1
    Date: 1986
    Page Range: 78--84
    Publication Info: Ottawa Ottawa Field-Naturalists' Club