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Colbert, E. H., Morales, M., & Minkoff, E. C. (2002). Colbert's evolution of the vertebrates: A history of the backboned animals through time (5th ed.). New York: Wiley-Liss.

Colbert, Edwin H., Michael Morales, and Eli C. Minkoff. Colbert's Evolution of the Vertebrates: A History of the Backboned Animals Through Time. 5th ed. New York: Wiley-Liss, 2002.

Colbert, Edwin H., Michael Morales, and Eli C. Minkoff. Colbert's Evolution of the Vertebrates: A History of the Backboned Animals Through Time. 5th ed. New York: Wiley-Liss, 2002.