TY  - BOOK
AU  - Piaget Jean
AU  -  Inhelder Barbel
TI  - Child's conception of space tr by F J Langdon and J L Lunzer
U1  - S:42, J6 
PY  - 1956///
CY  - London
PB  - Routledge and Kegan Paul UK   
KW  - PSYCHOLOGY
ER  -