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020 _a9789810194994
040 _cPK-LaCSN
082 _bT-197
_a540
100 _a"Toon,Tan Yin","Kwong,Chen ling"
245 0 _aGCE O level chemistry matters
260 _c2010
300 _a464
942 _2ddc
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999 _c665256
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