000 00344nam a2200145Ia 4500
020 _a0195776836
082 _b750
_a500
100 _a"Cheng, Tan Siok"
245 0 _aLower Secondary science porject Exploring science wb A-D
260 _c1998
300 _a30
944 _cTR
999 _c69688
_d69688