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By: Isler, Morton L - Isler, Phyllis R - Whitney, Bret M. - Zimmer, Kevin J.Type: ArticleIn: The Wilson journal of ornithologyVolume: 119Series:Issue: 1Date: 2007Page Range: 53--70Publication Info: Lawrence, KS, Wilson Ornithological Society, 2006-Subjects:
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By: Mayert, Sjoerd - Coopmans, Paul, - Krabbe, Niels, - Isler, Morton LType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 134Series:Issue: 2Date: 2014Page Range: 145--154Publication Info: London, British Ornithologists' Club, 1893-Subjects: