TY  - BOOK
AU  - Piaget, Jean
AU  - Inhelder, Barbel -jt.auth.
TI  - Child's conception of space
U1  - 155.4 
PY  - 1956///
CY  - London
PB  - Routledge and Kegan Paul
KW  - Child psychology
KW  - Space, Child
ER  -