TY  - BOOK
AU  - Geary,David C.
TI  - Children's mathematical development : : research and practical applications / 
SN  - 1-55798-258-9
AV  - QA135.5  G43
PY  - 1994///
CY  - Washington, DC : 
PB  - American Psychological Association, 
KW  - Mathematical ability
N1  - Incluye referencias bibliograficas (p. 289-315) e indice
ER  -