TY  - BOOK
AU  - Butterworth,George
AU  - Harris,Margaret
TI  - Principles of developmental psychology
SN  - 0863772803
PY  - 1994///
CY  - East Sussex
PB  - Lawrence Erlbaum associates Ltd
KW  - Development Pschology
N1  - References : p. 255 - 268
ER  -