PDF fulltext* Grimmett, Richard; Inskipp, Carol, Inskipp, Tim & Byers, Clive (1999): "Birds of India, Pakistan, Nepal, Bangladesh, Bhutan, Sri Lanka, and the Maldives".
PDF fulltext* Grimmett, Richard; Inskipp, Carol, Inskipp, Tim & Byers, Clive (1999): "Birds of India, Pakistan, Nepal, Bangladesh, Bhutan, Sri Lanka, and the Maldives".