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By: Sheffield, S RType: ArticleIn: The journal of raptor researchVolume: 28Series:Issue: 2Date: 1994Page Range: 119--120Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Sheffield, S R - Jobe, Noble,Type: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 1Date: 1996Page Range: 43--44Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Sheffield, S R - Howery, MType: ArticleIn: The journal of raptor researchVolume: 35Series:Issue: 4Date: 2001Page Range: 351--356Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: