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By: Chamberlain, Michael J - Leopold, Bruce DType: ArticleIn: The Wilson bulletinVolume: 112Series:Issue: 3Date: 2000Page Range: 326--331Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Van Why, Kyle R. - Chamberlain, Michael JType: ArticleIn: The Canadian field-naturalistVolume: 117Series:Issue: 1Date: 2003-01-01Page Range: 113--115Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: