TY  - BOOK
AU  - Inhelder Barbel
AU  -  Piaget Jean
TI  - Early growth of logic in the child :  Classification & Seriation   
SN  - 0 393 00473 2
U1  - R2xM96, K4 
PY  - 1964///
CY  - New York
PB  - Norton U. S. A.      
KW  -  Philosophy
KW  - Epistemology-Piaget
ER  -