books.google.com.au - With more than 5,000 works cited, Handbook of Avian Hybrids of the World is the greatest compendium of information ever published on hybridization in birds. Worldwide in scope, it provides information on all reported avian crosses, not only those occurring in captivity, but also in a natural setting...http://books.google.com.au/books/about/Handbook_of_Avian_Hybrids_of_the_World.html?id=MwInO7z_Y3oC&utm_source=gb-gplus-shareHandbook of Avian Hybrids of the World
