TY  - BOOK
AU  - Liebeck, Pamela  .
TI  - How children learn mathematics : a guide for parents and teachers / 
SN  - 0 14 022529 3
U1  - T13:(B) 
PY  - 1984///
CY  - London : 
PB  - Penguin Books  , 
KW  - Education- Learn mathematics
ER  -