000 00336nam a2200145Ia 4500
020 _a9812084444
082 _b4287
_a500
100 _a"tho lai hoong"
245 0 _aScience practical 1A
260 _b,Pan pacific
_asingapore
_c1997
300 _a109
944 _cTR
999 _c551101
_d551101