TY  - BOOK
AU  - Singer,Dorothy G.
AU  - Revenson,Tracey A.
TI  - A Piaget primer: how a child thinks 
SN  - 0823641368
AV  - BF723.C5.S5 1978 
PY  - 1978///
CY  - New York
PB  - International Universities Press
KW  - Piaget, Jean,
KW  - Cognition in children
N1  - Includes index; Bibliography: p. 135-143
ER  -