|
1
|
|
|
|
BF721
.P452
|
The child's conception of physical causality
|
London, [ United Kingdom ] : Routledge and Kegan Paul , 1930
|
Piaget, Jean
|
|
5314
|
|
2
|
|
|
|
BF721
.P5
|
Play, dreams and imitation in childhood/Jean Piaget
|
London, [ United Kingdom ] : Routledge and Kegan Paul , 1962
|
Piaget, Jean
|
|
5339
|
|
3
|
|
|
|
BF721
.P452
|
The child's conception of physical causality
|
New Jersey, [ United States ] : Littlefield, Adams and Company , 1960
|
Piaget, Jean
|
|
31825
|