000 00342nam a2200145Ia 4500
020 _a9812084312
082 _b3179
_a500
100 _a"Hoong Tho Lai"
245 0 _aNEW LOWER SECONDARY SCIENCE
260 _b,Pan pacific
_asingapore
_c1997
300 _a60
944 _cTR
999 _c602515
_d602515