000 00253nam a2200097Ia 4500
008 231013s9999 xx 000 0 und d
090 _a507.6
100 0 _aYeap Tok Kheng
245 0 0 _aEssential Science SPM
260 3 _aPetaling Jaya
_bPearson Malaysia
_c2008
999 _c13433
_d13433