Erik Hirschfeld, Andy Swash & Robert Still, with contributions by Nick Langley [and three others], and illustrations by Tomasz Cofta.Princeton University Press[2013]<RA567-B78>
compiled by Warren B. King on behalf of the International Council for Bird Preservation and the Species Survival Commission of the International Union for Conservation of Nature and Natural ResourcesPublished by the Smithsonian Institution Press in cooperation with the International Council for Bird Preservation1981