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By: Ivor, Hance Roy,Type: ArticleIn: The Wilson bulletinVolume: 56Series:Issue: 2Date: 1944Page Range: 91--104Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Ivor, Hance Roy,Type: ArticleIn: The Canadian field-naturalistVolume: 48Series:Issue: 1Date: 1934-01Page Range: 8--10Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: