| 1 |
The role of possibility in cognitive development / Jean Piaget ; with E. Ackermann-Valladao ... [et al.] ; translated from theFrench by Helga Feider
Minneapolis : University of Minnesota Press , c1987
|
| 2 |
The role of necessity in congnitive development /Jean Piaget ; with E. Ackermann-Valladao ... [et al.] ; translated from the French by Helga Feider
Minneapolis : University of Minnesota Press , c1987
|
| 3 |
Possibility and necessity
Minneapolis : University of Minnesota Press , c1987
|
| 4 |
L''évolution du nécessaire chez l''enfant / Jean Piaget ; avec la collaboration de E. Ackermann-Valladao ... [et al.]
Paris : Presses Universitaires de France , 1983
|
