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  1. By: Mayfield, Harold F.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 4
    Date: 1983
    Page Range: 371--376
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Mayfield, Harold F.
    Type: Article
    In: The Wilson bulletin
    Volume: 67
    Issue: 1
    Date: 1955
    Page Range: 69--69
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-