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  1. By: Johnstone, Walter B.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 67
    Issue: 4
    Date: 1953
    Page Range: 181--181
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Johnstone, Walter B.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 68
    Issue: 4
    Date: 1954
    Page Range: 155--164
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Johnstone, Walter B.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 78
    Issue: 3
    Date: 1964
    Page Range: 199--200
    Publication Info: Ottawa Ottawa Field-Naturalists' Club