Benton, M.J. 2000. Vertebrate Palaeontology. Blackwell Science, Ltd., Oxford. 452 pp.
Colbert, E.H., M. Morales, and E.C. Minkoff. 2001. Colbert’s Evolution of the Vertebrates. Wiley-Liss, New York. 560 pp.
Zimmer, C. 1999. At the Water’s Edge. Touchstone Books, New York. 304 pp.