TY  - BOOK
AU  - Cox,Christopher J.
AU  - Bell,David
ED  - Murray 
TI  - Understanding mathematics 3: teachers΄resourse book 
SN  - 0719547571
U1  - 510 23
PY  - 1990///.
CY  - London: 
PB  - Murray, 
KW  - Mathematics
ER  -