TY  - BOOK
AU  - Piaget, Jean,
AU  - Elkind, David,
AU  - Tenzer, Anita.
TI  - Six psychological studies
U1  - 150.8 PIA 
PY  - 1967///
CY  - New York
PB  - Vintage Books
KW  - Psychology
KW  - Study and teaching
N1  - Include index
ER  -