TY  - BOOK
AU  -  Piaget, Jean
AU  - Inhelder, Barbel 
TI  - The child's conception of space
PY  - 1956///
CY  - New York
PB  - Humanities Press
KW  - Piaget Jean 1896
KW  - 1980
KW  - Child study
KW  - Drawing
KW  - Space-perception
ER  -