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By: Macinnes, Charles D - Dunn, Erica H - Rusch, D H - Cooke, F. (Fred) - Cooch, GrahamType: ArticleIn: The Canadian field-naturalistVolume: 104Series:Issue: 2Date: 1990Page Range: 295--297Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Moser, Timothy J. - Rusch, D HType: ArticleIn: The Canadian field-naturalistVolume: 102Series:Issue: 1Date: 1988Page Range: 60--61Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Rusch, D H - Gillespie, Murray M. - McKay, David I.Type: ArticleIn: The Canadian field-naturalistVolume: 92Series:Issue: 2Date: 1978Page Range: 123--127Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Williams, Christopher K. - Applegate, Roger D. - Lutz, R S - Rusch, D HType: ArticleIn: The journal of raptor researchVolume: 34Series:Issue: 3Date: 2000Page Range: 203--209Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: