Weichert, Charles K. Anatomy of the chordates / by Charles K. Weichert - 4th ed. - New York : McGraw-Hill , 1970 - vii , 814p. : ill . ; 21 cm . Includes index ISBN: 0070690073 Subjects--Topical Terms: Chordata--AnatomyAnatomy, ComparativeVertebrates--Anatomy