TY  - BOOK
AU  - TAN,Betty
AU  - Yeo Chee Kai
TI  - Biologi 'O' Level Guide 
SN  - 978-981-273-029-9
U1  - 574. 
PY  - 2009///
CY  - Singapore
PB  - EPB Pan Pacific
KW  - 0
KW  - Grade 7-9
ER  -