TY  - BOOK
AU  - Wijeratne,  Chanakya J.
TI  - Challenging maths
SN  - 9789556523966
U1  - B1072 
PY  - 2008///
CY  - Punchi Borella
PB  - Wijesooriya Grantha Kendraya
KW  - BOOKS BOX B1072
KW  - IMO
KW  - MATHEMATICAL TULENT
KW  - MATHEMATICS KNOWLEDGE
KW  - MATHS PROBLEMS
ER  -