Weiner, Irving B., Desarrollo normal y anormal del preescolar I.B. Weiner y D. Elkind. - Buenos Aires Editorial Paidós 1976. - 81 p. - Biblioteca del educador contemporáneo. vol. 216 . Translation of chapters 6-9 of Child development: a core approach. Bibliography: p. [78]-81. Subjects--Topical Terms: Child development