TY  - BOOK
AU  - Elkind,David
AU  - Flavell,John H.
TI  - Cognitive development: Essays in honor of Jean Piaget 
PY  - 1969///
CY  - New York, London
PB  - Oxford University Press
KW  - Piaget, Jean,
KW  - Child development
N1  - Includes bibliographies and index
ER  -