TY  - BOOK
AU  - Gruber, Howard
AU  - J. Jacques
TI  - The Essential Piaget : An Interpretive Reference and Guide
SN  - 0465020585
PY  - 1977///
CY  - New York
PB  - Basic Books, Inc Publisher
KW  - Cognition (Child Psychology) - Collected Works
KW  - Knowledge, theory of - Collected Workd
KW  - Biography - Collected Works
ER  -