Birds of Bhutan and the Eastern Himalayas. Helm Field Guides
Grimmett, Richard, Carol Inskipp, Tim Inskipp, Sherub
Of Birds and Birdsong
Bharatpur: Bird Paradise
On the Birds of Southern Tibet [Ibis 1906]
Walton, Captain H.J.
Illustrations by Keulemans, J.G.
Handbook of the Birds of India and Pakistan, Vol. 1, Second edition
Ali, Salim; Ripley, S. Dillon
Tibet and Its Birds
A Photographic Field Guide to the Birds of India, Pakistan, Nepal, Bhutan, Sri Lanka, and Bangladesh
Birds of Nepal with Reference to Kashmir and Sikkim
FLEMING, Robert L. Sr., Robert L. FLEMING, Jr. and Lain Singh BANGDEL.
Collins Handguide to the Birds of the Indian Sub-Continent
Collins Handguide to the Birds of the Indian Sub-Continent: India, Pakistan, Bangladesh, Sri Lanka..
Collins Field Guide: Birds of India. Pakistan, Nepal, Bhutan, Bangladesh and Sri Lanka
Behavior and Ecology of the Asiatic Elephant in Southeastern Ceylon.
McKay, George M.