TY  - BOOK
AU  - Walpole,Brenda
TI  - Udara
T2  - Siri kemahiran sains
SN  - 967610440X
U1  - 507 23
PY  - 1994///
CY  - Kuala Lumpur : 
PB  - Utusan , 
KW  - Science - Study and teaching
N1  - Includes indexes
ER  -