HBW and BirdLife International illustrated checklist of the birds of the world /
Hoyo, Josep del,author.
Collar, N. J.,author.
BirdLife International.
"Texts based on the initial contributions from the authors of the Handbook of the birds of the world, volumes 1-7 and special volume"--Title page, volume 1.
Includes bibliographical references and indexes.
Volume 1. Non-passerines -- v. 2. Passerines --
Birds
Birds