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By: Bugden, Shawn C - Evans, Roger MType: ArticleIn: The Canadian field-naturalistVolume: 111Series:Issue: 2Date: 1997Page Range: 234--237Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Bugden, Shawn C - Evans, Roger MType: ArticleIn: The Wilson bulletinVolume: 111Series:Issue: 2Date: 1999Page Range: 188--194Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: