TY  - BOOK
AU  - Collins, W. Andrew
TI  - Aspects of the development of competence
SN  - 9780898590708
U1  - 155.413 COL 
PY  - 1981///
CY  - Hillsdale, N.J
PB  - L. Erlbaum Associates
KW  - Cognition in children - Congresses
ER  -