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By: Mcpherson, R J - Brown, Richard D.Type: ArticleIn: Raptor researchVolume: 15Series:Issue: 1Date: 1981Page Range: 23--30Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Brown, Richard D.Type: ArticleIn: The journal of raptor researchVolume: 28Series:Issue: 1Date: 1994Page Range: 54--54Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: