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  1. By: Blokpoel, Hans, - Hatch, David R. M
    Type: Article
    In: The Canadian field-naturalist
    Volume: 90
    Issue: 2
    Date: 1976
    Page Range: 195--195
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Cook, Francis R. - Hatch, David R. M
    Type: Article
    In: The Canadian field-naturalist
    Volume: 78
    Issue: 1
    Date: 1964
    Page Range: 60--61
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Vermeer, Kees - Hatch, David R. M - Windsor, J. A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 86
    Issue: 2
    Date: 1972
    Page Range: 168--168
    Publication Info: Ottawa Ottawa Field-Naturalists' Club