TY  - BOOK
AU  - Gordon,Maria
TI  - Udara
T2  - Siri Sains Asas
SN  - 9837503432
U1  - 530.4 23
PY  - 1995///
CY  - Petaling Jaya, Selangor : 
PB  - Pan Earth , 
KW  - Physics - Study and teaching
ER  -