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  1. By: Wolff, Jerry O. - Cowling, Joanne
    Type: Article
    In: The Canadian field-naturalist
    Volume: 95
    Issue: 1
    Date: 1981
    Page Range: 85--88
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Wolff, Jerry O. - Dueser, Raymond D
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 2
    Date: 1986
    Page Range: 186--191
    Publication Info: Ottawa Ottawa Field-Naturalists' Club