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  1. By: Davis, Rolph A - Jones, Rene N - Macinnes, Charles D - Pakulak, Allan J
    Type: Article
    In: The Wilson bulletin
    Volume: 97
    Issue: 3
    Date: 1985
    Page Range: 296--305
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Davis, Rolph A - Jones, Rene N
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 2
    Date: 1971
    Page Range: 191--192
    Publication Info: Ottawa Ottawa Field-Naturalists' Club