TY  - BOOK
AU  - Keats, John Augustus
AU  - Collis, Kevin F. ( Kevin Francis )
AU  - Halford, G. S. ( Graeme S. )
TI  - Cognitive development : research based on a neo - Piagetian approach
AV  - BF723.C5C56 
PB  - Wiley
KW  - Cognition in children
KW  - BF
N1  - Bibliography: p. [429]-446; Includes index
ER  -