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  1. By: Schowalter, D. (Tim) - Gunson, J. R. - Harder, Lawrence D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 3
    Date: 1979
    Page Range: 243--251
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Harder, Lawrence D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 4
    Date: 1979
    Page Range: 405--410
    Publication Info: Ottawa Ottawa Field-Naturalists' Club