TY  - BOOK
AU  - Inhelder,Barbel
AU  - Piaget,Jean
TI  - The early growth of logic in the child, classification and seriation,
AV  - BC 72 .I513 1964
PY  - 1964///]
CY  - New York
PB  - Harper & Row
KW  - Logic
N1  - Bibliographical footnotes
ER  -