TY  - BOOK
AU  - ONG Pheng Yen
AU  - Sophia Ang
TI  - a Handbook For Mathematics Teachers In Secondary Schools 
SN  - 981-01-9323-8
U1  - 510. 
PY  - 2003///
CY  - Singapore
PB  - Fideral Publications
KW  - 0
KW  - Grade 10-12
ER  -