extinct humans
References
Extinct Humans. by Ian Tattersall, Jeffrey H. Schwartz. Westview Press (November, 2001). ISBN: 0813339189
Becoming Human: Evolution and Human Uniqueness. by Ian Tattersall. Harvest Books (July 8, 1999). ISBN: 0156006537
From Lucy To Language. by Blake Edgar, Donald Johanson. Simon & Schuster (November 27, 1996). ISBN: 0684810239
The Fossil Trail: How We Know What We Think We Know About Human Evolution. Oxford University Press; Reprint edition (December, 1996). ISBN: 0195109813
The Cambridge Encyclopedia of Human Evolution (Cambridge Reference Book). by Richard Dawkins (Foreword), Stephen Jones (Editor), Robert D. Martin (Editor), David R. Pilbeam (Editor). Cambridge University Press; Reprint edition (June 30, 1994). ISBN: 0521467861
Origins Reconsidered : In Search of What Makes Us Human. by Richard E. Leakey. Anchor; Reprint edition (October 1, 1993). ISBN: 0385467923
Lucy: The Beginnings of Humankind. by Maitland Edey, Donald Johanson. Simon & Schuster; Reissue edition (September 15, 1990). ISBN: 0671724991