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3. Inskipp, T., N. Lindsey, and W. Duckworth (1996). An Annotated Checklist of the Birds of the Oriental Region. Oriental Bird Club, Sandy, UK.
4. Erritzøe, J., and H. B. Erritzøe (1998). Pittas of the World: A Monograph on the Pitta Family. The Lutterworth Press, Cambridge, UK.
5. Dickinson, E. C., Editor (2003). The Howard and Moore Complete Checklist of the Birds of the World. Third edition. Christopher Helm, London, UK.