TY  - BOOK
AU  - Giblin,Peter J.
AU  - Porteous,Ian R.
ED  - Mathematical Education on Merseyside.
TI  - Challenging mathematic: a selection of secondary school mathematics problems 
SN  - 0199143617
U1  - 510 
PY  - 1990///
CY  - Oxford
PB  - Oxford University Press
KW  - Mathematics
ER  -