TY  - BOOK
AU  - Inhelder B
AU  -  Piaget J
TI  - Early growth of logic in the child:  classiflication and seriation tr from the French by E A Lunzer and D Pepert
U1  - S1:44, K4-;1 
PY  - 1964///
CY  - London
PB  - Routledge and Kegan Paul UK   
KW  - PSYCHOLOGY
ER  -