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By: Johns, Brian WType: ArticleIn: The Wilson bulletinVolume: 105Series:Issue: 2Date: 1993Page Range: 256--264Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Kuyt, Ernie - Johns, Brian WType: ArticleIn: The Canadian field-naturalistVolume: 106Series:Issue: 4Date: 1992Page Range: 507--510Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: