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By: Graul, Walter DType: ArticleIn: The Wilson bulletinVolume: 85Series:Issue: 1Date: 1973Page Range: 60--70Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Graul, Walter DType: ArticleIn: The Wilson bulletinVolume: 86Series:Issue: 3Date: 1974Page Range: 221--229Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: