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By: Henny, C J - Blus, Lawrence J.Type: ArticleIn: Raptor researchVolume: 15Series:Issue: 3Date: 1981Page Range: 82--85Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Blus, Lawrence J.Type: ArticleIn: The Wilson bulletinVolume: 96Series:Issue: 2Date: 1984Page Range: 268--276Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Henny, Charles J - Blus, Lawrence J. - Stafford, Charles J.Type: ArticleIn: The Canadian field-naturalistVolume: 96Series:Issue: 2Date: 1982Page Range: 210--211Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Blus, Lawrence J.Type: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 4Date: 1996Page Range: 198--206Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Blus, Lawrence J.Type: ArticleIn: The Wilson bulletinVolume: 79Series:Issue: 4Date: 1967Page Range: 449--449Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Henny, C J - Blus, Lawrence J. - Kaiser, T EarlType: ArticleIn: Raptor researchVolume: 18Series:Issue: 2Date: 1984Page Range: 41--48Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Blus, Lawrence J. - Prouty, Richard MType: ArticleIn: The Wilson bulletinVolume: 91Series:Issue: 1Date: 1979Page Range: 62--71Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Henny, Charles J - Blus, Lawrence J. - Grove, Robert A.Type: ArticleIn: The Canadian field-naturalistVolume: 104Series:Issue: 3Date: 1990Page Range: 460--472Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: