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By: Miranda, Hector C., Jr. - Kennedy, Robert S - Sison, Rogelio V - Gonzales, Pedro C. - Ebreo, Mila FType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 120Series:Issue:Date: 2000Page Range: 266--280Publication Info: London, British Ornithologists' Club, 1893-Subjects: