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By: Helms, Carl WType: ArticleIn: The Wilson bulletinVolume: 71Series:Issue: 3Date: 1959Page Range: 244--253Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Helms, Carl W - Smythe, Robert BType: ArticleIn: The Wilson bulletinVolume: 81Series:Issue: 3Date: 1969Page Range: 280--292Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: