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By: Crocoll, S T - Parker, J WType: ArticleIn: The journal of raptor researchVolume: 23Series:Issue: 4Date: 1989Page Range: 125--139Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Parker, J W - Ports, MType: ArticleIn: Raptor researchVolume: 16Series:Issue: 1Date: 1982Page Range: 14--17Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Parker, J WType: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 1Date: 1999Page Range: 63--66Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: