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By: Boal, Clint W. - Bibles, Brent D. - Mannan, R WType: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 3Date: 1997Page Range: 286--287Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Bibles, Brent D. - Mannan, R AType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 3Date: 2004Page Range: 238--242Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Boal, Clint W. - Snyder, H A - Bibles, Brent D. - Estabrook, T SType: ArticleIn: The journal of raptor researchVolume: 37Series:Issue: 4Date: 2003Page Range: 277--285Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: