TY  - BOOK
AU  - Inhelder, Barbel
AU  - Sinclair, Hermine
AU  - Inhelder, Barbel
TI  - Learning and development of cognition
SN  - 0 7100 8057 3
U1  - 153.4 
PY  - 1974///
CY  - London
PB  - Routledge & Kegan Paul
ER  -