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By: Holroyd, G L - Banasch, UrsulaType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 3Date: 1996Page Range: 145--156Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Holroyd, G L - Banasch, UrsulaType: ArticleIn: The journal of raptor researchVolume: 37Series:Issue: 2Date: 2003Page Range: 98--116Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Banasch, Ursula - Goossen, J. Paul - Riez, Alberto Einstein - Casler, Clark - Barradas, Romeo DominguezType: ArticleIn: The Canadian field-naturalistVolume: 106Series:Issue: 4Date: 1992Page Range: 493--498Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Fyfe, Richard W. - Banasch, Ursula - Benavides, Virgilio - de Benavides, Nancy Hilgert - Luscombe, Anthony - Sánchez, Julio E.Type: ArticleIn: The Canadian field-naturalistVolume: 104Series:Issue: 2Date: 1990Page Range: 285--292Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Holroyd, Geoffrey L - Banasch, UrsulaType: ArticleIn: The Canadian field-naturalistVolume: 104Series:Issue: 2Date: 1990Page Range: 203--208Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Schmutz, Josef K. (Josef Konrad), - Fyfe, Richard W. - Banasch, Ursula - Armbruster, HarryType: ArticleIn: The Wilson bulletinVolume: 103Series:Issue: 1Date: 1991Page Range: 44--58Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: