"The official world checklist of the American Birding Association. Published in collaboration with the Cornell Laboratory of Ornithology."
Rev. ed. of: Birds of the world, 2000.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The Clements checklist of the birds of the world by James F. Clements. ISBN 9780713686951. Published by Christopher Helm in 2007. Publication and catalogue information, links to buy online and reader comments.
