TY  - BOOK
AU  - Piaget Jean
AU  - Inhelder Barbel
AU  - Langdon F J tr. Lunzer J L
TI  - Child's conception of space
U1  - 152.752 
PY  - 1956///
CY  - London
PB  - Routledge & Kegan Paul
KW  - Children
KW  - Space
ER  -