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By: Avery, Graham M.Type: ArticleIn: Annals of the South African Museum. Annale van die Suid-Afrikaanse MuseumVolume: 96Series:Issue:Date: 1985Page Range: 55--65Publication Info: Cape Town, South African Museum, 1898-2004Subjects:
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By: Jenkins, A R - Avery, Graham M.Type: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 3Date: 1999Page Range: 190--206Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Simmons, R E - Avery, D. M. - Avery, Graham M.Type: ArticleIn: The journal of raptor researchVolume: 25Series:Issue: 3Date: 1991Page Range: 63--67Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: