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  1. By: Campbell, R. E.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 1
    Date: 1992
    Page Range: 27--35
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Campbell, R. E.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 1
    Date: 1992
    Page Range: 24--26
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Campbell, R. E.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 1
    Date: 1992
    Page Range: 19--23
    Publication Info: Ottawa Ottawa Field-Naturalists' Club