The last human : a guide to twenty-two species of extinct humans / created by G.J. Sawyer and Viktor Deak ; text by Esteban Sarmiento, G.J. Sawyer and Richard Milner ; with contributions by Donald C. Johanson, Meave Leakey and Ian Tattersall.    New Haven, Conn. ; London :  Yale University Press,  c2007 . 256 s.
http://www.loc.gov/catdir/enhancements/fy0801/2006928034-d.html http://www.loc.gov/catdir/enhancements/fy0801/2006928034-b.html