TY  - BOOK
AU  - Keats,J.A.
AU  - Collis,Kevin F.
AU  - Halford,G.S
TI  - Cognitive development: research based on a Neo-Piagetian approach 
SN  - 0471995053 :
U1  - 136.7 
PY  - 1978///
CY  - New York
PB  - John Wiley
KW  - Cognition in children
N1  - Includes bibliographical references and index
ER  -