TY  - BOOK
AU  - Piaget,Jean
AU  - Gruber,Howard E.
AU  - Von�eche,J.Jacques
TI  - The essential Piaget
SN  - 0465020585
AV  - BF 723 .C5 P494
PY  - 1977///
CY  - New York
PB  - Basic Books
KW  - Cognition in children
KW  - Knowledge, Theory of
KW  - Biology
N1  - Includes index; Bibliography: p. [861]-866
ER  -