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By: Van Riper, Charles, - Harrison, Julian R. 3rdType: ArticleIn: The Wilson bulletinVolume: 94Series:Issue: 4Date: 1982Page Range: 463--476Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Van Riper, Charles, - Kern, Michael Don, - Sogge, M KType: ArticleIn: The Wilson bulletinVolume: 105Series:Issue: 3Date: 1993Page Range: 436--447Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Willey, David W. - Van Riper, Charles,Type: ArticleIn: The journal of raptor researchVolume: 34Series:Issue: 1Date: 2000Page Range: 1--7Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: