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  1. By: Virgl, John A. - McPhail, J. D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 108
    Issue: 3
    Date: 1994
    Page Range: 355--360
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Larivière, Serge - Walton, Lyle R. - Virgl, John A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 114
    Issue: 1
    Date: 2000
    Page Range: 142--144
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Virgl, John A. - Mahoney, Shane P. - Mawhinney, Kimberley M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 117
    Issue: 2
    Date: 2003-04-01
    Page Range: 236--244
    Publication Info: Ottawa Ottawa Field-Naturalists' Club