TY  - BOOK
AU  - Piaget,Jean
AU  - translated by C. Gattegno and F.M. Hodgson.
TI  - Child's conception of number
T2  - Selected works
SN  - 0415168880
U1  - 155.4 
PY  - 1997///
CY  - New York
PB  - Routledge
KW  - Number concept in children
KW  - Cognition in children
N1  - Includes bibliographical references and index
UR  - http://www.loc.gov/catdir/enhancements/fy0649/98160617-d.html
ER  -