TY  - BOOK
AU  - Hughes, Martin
TI  - Children and number:  difficulties in learning mathematics
SN  - 0-631-13581-2
U1  - 372.7285 
PY  - 1986///
CY  - Oxford
PB  - Basil Blackwell
KW  - Number concept in children
N1  - includes bibliography and index
ER  -