Witmer Lawrence M. The Search for the Origin of Birds

Franklin Watts, 1995. — 65 p. — ISBN13: 978-0531112328.How do we find out about the origins of a group of animals, when the origins usually lie far in the past? This fascinating and appealingly written book looks at how scientists have searched for clues about the beginnings of birds, and are now building a body of evidence suggesting that birds descended from — and, in fact, are — carnivorous dinosaurs.
Full-color illustrations.