TY  - BOOK
AU  - Jean Piaget
TI  - Six Psychological Studies
SN  - 340095571
U1  - 155.41 P579si 
PY  - 1968///
CY  - London
PB  - University of London Press.
N1  - Translation from the Frensh by :Anita Tenzer.
Original name:Six études de Psychologie
ER  -