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  1. By: Schierbeck, Otto
    Type: Article
    In: The Canadian field-naturalist
    Volume: 45
    Issue: 2
    Date: 1931-02
    Page Range: 28--30
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Schierbeck, Otto
    Type: Article
    In: The Canadian field-naturalist
    Volume: 43
    Issue: 1
    Date: 1929-01
    Page Range: 6--9
    Publication Info: Ottawa Ottawa Field-Naturalists' Club