Isaacs, Nathan The growth of understanding in the young child : a brief introduc tion to Piaget's work / N. Isaacs. - London : Ward Lock Educational Co. Ltd., 1961, repr. 1966 - 41 p. ; 21 cm. Includes bibliographical references. Subjects--Personal Names: Piaget, Jean, 1896-1980. Subjects--Topical Terms: Child development. Child psychology. Dewey Class. No.: 155.413