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  1. By: Heimburger, Carl C.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 59
    Issue: 2
    Date: 1945
    Page Range: 67--67
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Heimburger, Carl C. - Porsild, A. E. (Alf Erling),
    Type: Article
    In: The Canadian field-naturalist
    Volume: 52
    Issue: 5
    Date: 1938-05
    Page Range: 72--73
    Publication Info: Ottawa Ottawa Field-Naturalists' Club