Nieuwkoop, Pieter D. . The epigenetic nature of early chordate developpment : Inductive interaction and competence / by Pieter D. Nieuwkoop , A.G.Johnen and B. Albers. - Cambridge : Cambridge university press , 1985. - ix,373p. : ills. ; 25cm . Includes Index ISBN: 0521251079 NULL Subjects--Index Terms: EMBRYOLOGY-VERTEBRATES Dewey Class. No.: 596.033 / NIE/E