TY  - BOOK
TI  - Mechanisms of cognitive development
T2  - A series of books in psychology (W. H. Freeman, San Francisco)
SN  - 0-7167-1596-1
U1  - 153.4 21E
PY  - 1984///
CY  - New York
PB  - W. H. Freeman
N1  - Notes bibliogr
ER  -