00000cam a22000004a 4500 UP-1685523046125133308 Buklod 20230503092606.0 aa r |||| u| ta 991231s1972 xx r |||| u|eng|| 0393010031 (iLib)UPMNL-00000025016 BF 717 P43 1972 Play and development a symposium with contributions by Jean Piaget ... [et al.] ; edited by Maria W. Piers. New York Norton c1972. 176 p. ill. 21 cm. Six papers from a series of meetings planned by the Erikson Institute, the School of Education, and the Dept. of Psychology of Loyola University, as part of the university's centennial activities. Child psychology. Developmental psychobiology. Play. Piaget, Jean 1896-. Piers, Maria W. Erikson Institute. Loyola University, Chicago. School of Education. Loyola University, Chicago. Dept. of Psychology. UPMNL MED BF 717 P43 1972 Book