000 00238nam a2200097Ia 4500
008 231013s9999 xx 000 0 und d
090 _a507.6
100 0 _aChong, Kum Ying
245 0 0 _aScience
260 3 _aSelangor
_bPenerbitan Pelangi
_c2007
999 _c21254
_d21254