Pough, F. Harvey. Vertebrate life / [electronic resource] / F. Harvey Pough, John B. Heiser, William N. McFarland.. — 4th ed.. — Upper Saddle River, N.J. : : Prentice Hall,, c1996.. — xvii, 798 p., [4] p. of plates : : ill. (some col.), maps ; 26 cm.