TY  - GEN
AU  - Piaget, Jean
AU  - Gruber, Howard E
AU  - Voneche, J.Jacques
TI  - The essential piaget
SN  - 0465020585
U1  - 155.41308 
PY  - 1977///
CY  - New York
PB  - Basic Books
KW  - CHILD PSYCHOLOGY
KW  - INTELLIGENCE
KW  - MENTAL PROCESS
KW  - PSYCHOLOGY
ER  -