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By: Johnsgard, Paul A - Wood, Robert EType: ArticleIn: The Wilson bulletinVolume: 80Series:Issue: 2Date: 1968Page Range: 173--188Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Timm, Daniel E. - Morgan, Sidney O. - Wood, Robert EType: ArticleIn: The Canadian field-naturalistVolume: 89Series:Issue: 3Date: 1975Page Range: 322--322Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: