TY  - BOOK
AU  - Piaget,Jean
AU  - Ackermann-Valladao, E.
TI  - Possibility and necessity
SN  - 0816613702 (v. 1)
PY  - 1987///
CY  - Minneapolis
PB  - University of Minnesota Press
KW  - Possibility
KW  - Psychological aspects
KW  - Necessity (Philosophy)
KW  - Reality in children
KW  - Cognition in children
N1  - Translation of: Le possible et le neÃÅcessaire; Includes bibliographical references and indexes; v. 1. The role of possibility in cognitive development -- v. 2. The role of necessity in cognitive development
ER  -