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  1. By: Clark, Karen L - Euler, David - Armstrong, Edward
    Type: Article
    In: The Wilson bulletin
    Volume: 95
    Issue: 1
    Date: 1983
    Page Range: 77--96
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Armstrong, Edward - Euler, David
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 2
    Date: 1983
    Page Range: 200--207
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Armstrong, Edward - Noakes, David L. G.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 4
    Date: 1983
    Page Range: 434--438
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Armstrong, Edward - Brown, Gary
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 2
    Date: 1986
    Page Range: 262--263
    Publication Info: Ottawa Ottawa Field-Naturalists' Club