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  1. By: Chitty, Dennis - Chitty, Helen
    Type: Article
    In: The Canadian field-naturalist
    Volume: 56
    Issue: 2
    Date: 1942-02
    Page Range: 17--21
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Chitty, Helen
    Type: Article
    In: The Canadian field-naturalist
    Volume: 57
    Issue: 7-8
    Date: 1943
    Page Range: 136--141
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Chitty, Helen
    Type: Article
    In: The Canadian field-naturalist
    Volume: 60
    Issue: 3
    Date: 1946
    Page Range: 67--70
    Publication Info: Ottawa Ottawa Field-Naturalists' Club