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By: Dilger, William C - Johnsgard, Paul AType: ArticleIn: The Wilson bulletinVolume: 71Series:Issue: 1Date: 1959Page Range: 46--53Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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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: Johnsgard, Paul AType: ArticleIn: The Wilson bulletinVolume: 72Series:Issue: 2Date: 1960Page Range: 133--155Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Johnsgard, Paul AType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 88Series:Issue:Date: 1968Page Range: 140--148Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Johnsgard, Paul AType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 81Series:Issue:Date: 1961Page Range: 37--43Publication Info: London, British Ornithologists' Club, 1893-Subjects: