TY  - BOOK
AU  - Piaget Jean
AU  - Warden Warden
TI  - Judgement and reasoning in the child
U1  - 136.7 
PY  - 1951///
CY  - London
PB  - Routledge & Kegan Paul
KW  - Child psychology
KW  - Differential psychology
KW  - Psychology
ER  -