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By: Curatolo, J A - Murphy, Stephen M.Type: ArticleIn: The Canadian field-naturalistVolume: 100Series:Issue: 2Date: 1986Page Range: 218--224Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Ritchie, R J - Curatolo, J AType: ArticleIn: Raptor researchVolume: 16Series:Issue: 4Date: 1982Page Range: 123--128Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: