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By: Henny, C J - Blus, Lawrence J. - Kaiser, T EarlType: ArticleIn: Raptor researchVolume: 18Series:Issue: 2Date: 1984Page Range: 41--48Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Ohlendorf, Harry M. - Klaas, Erwin E - Kaiser, T EarlType: ArticleIn: The Wilson bulletinVolume: 90Series:Issue: 4Date: 1978Page Range: 608--618Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: