TY  - BOOK
AU  - Pulaski, Mary Ann Spencer 
TI  - Understanding Piaget: : an introduction to children's cognitive development
SN  - 060134399
PY  - 1971///
CY  - New York
PB  - Harper & Row
KW  - Piaget Jean 1896
KW  - 1980
KW  - Cognition (Child psychology)
ER  -