TY  - BOOK
AU  - Pulaski,Mary Ann Spencer
TI  - Understanding Piaget: an introduction to children's cognitive development 
SN  - 0060134399
U1  - 136.7 
PY  - 1971///
CY  - New York
PB  - Harper & Row
KW  - Piaget, Jean,
KW  - Cognition in children
N1  - Includes bibliographical references and index
ER  -