TY  - BOOK
AU  - Ginsburg Herbert P
AU  -  Opper Sylvia.
TI  - Piaget's theory of intellectual development
SN  - 0136751660
U1  - S1xM96:g, M8 
PY  - 1988///
CY  - Engleweed
PB  - Cliffs Prentice Hall     
KW  - CHILD PSYCHOLOGY
ER  -