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  1. By: Zavitz, C. Harold
    Type: Article
    In: The Canadian field-naturalist
    Volume: 63
    Issue: 1
    Date: 1949
    Page Range: 42--43
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Zavitz, C. Harold
    Type: Article
    In: The Canadian field-naturalist
    Volume: 66
    Issue: 5
    Date: 1952
    Page Range: 144--145
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Zavitz, C. Harold
    Type: Article
    In: The Canadian field-naturalist
    Volume: 62
    Issue: 4
    Date: 1948
    Page Range: 126--126
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Zavitz, C. Harold - Gaiser, Lulu Odell
    Type: Article
    In: Rhodora
    Volume: 58
    Date: 1956
    Page Range: 31--35
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],