TY  - BOOK
AU  - Hughes,Martin
TI  - Children and Number Difficulties in Learning Mathematics
SN  - 9780631135814 (pbk) :
AV  - BF723.N8 
U1  - 372.72 19
PY  - 1986///
CY  - Oxford
PB  - Basil Blackwell
KW  - Number concept in children
N1  - Bibliography: p185-189. _ Includes index
ER  -