The Psychology of preschool children / A. V. Zaporozhets and D. B. Elkonin, editors. Translated by John Shybut and Seymore Simon. Zaporozhet︠s︡, A. V. ed. Ėlʹkonin, D. B. ed. Child psychology. Cognition in children. BF721 .P77613 136.73532 ZAP Includes bibliographies. Cambridge : MIT, c1971. c1971. 1971 Text xxiii, 376 p. ; eng eng rus