TY  - BOOK
AU  - Piaget,Jean
TI  - Ensayo de lógica operatoria
T2  - Biblioteca Pedagogica
U1  - 160 
PY  - 1977///
CY  - Buenos Aires
PB  - Editorial Guadalupe
KW  - Piaget, Jean,
KW  - Logic
KW  - Local
N1  - Translation of : Essai de logique opératoire; Includes bibliographical references and index
ER  -