TY  - BOOK
AU  - Piaget,Jean
AU  - Campbell,Robert L
TI  - Studies in reflecting abstraction
SN  - 1841691577 :
U1  - 155.41343 
PY  - 2001///
CY  - Philadelphia
PB  - Psychology Press
KW  - Abstraction in children
KW  - Schemas (Psychology) in children
N1  - Includes index
ER  -