TY  - BOOK
AU  - 
TI  - Apa dan mengapa : : bumi kita
SN  - 9839372041
U1  - 039.992302 23
PY  - 1997///
CY  - Shah Alam, Selangor : 
PB  - Piramid Perdana , 
KW  - Children's encyclopedias and dictionaries
N1  - Jilid 6
ER  -