000 00356nam a2200145Ia 4500
020 _a9789812808103
082 _b1422T
_a500
100 _a"Pec Ho"
245 0 _ainternational lower secondary science
260 _bmarshall cavendish
_aSingapore
_c2009
300 _a203
944 _cTB
999 _c791050
_d791050