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By: Bradshaw, Chris G., - Kirwan, Guy M - Williams, Robert S. R.Type: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 117Series:Issue:Date: 1997Page Range: 315--316Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Fjeldså, Jon - Baiker, Jan - Engblom, Gunnar - Franke, Irma - Geale, David - Krabbe, Niels, - Lane, Daniel F - Lezama, Miguel - Schmitt, Fabrice - Williams, Robert S. R. - Ugarte-Núnñez, Joaquiín - Yábar, Virgilio - Yábar, RamiroType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 132Series:Issue: 3Date: 2012Page Range: 180--193Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Kirwan, Guy M - Martuscelli, Paulo - Silveira, Luis Fabio - Williams, Robert S. R.Type: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 119Series:Issue:Date: 1999Page Range: 202--206Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Williams, Robert S. R. - Jacoby, Martin CType: ArticleIn: Bulletin of the African Bird ClubVolume: 3Series:Issue: 2Date: 1996-09Page Range: 132--133Publication Info: Cambridge, African Bird Club, 1994-Subjects: