000 00320nam a2200145Ia 4500
020 _a9789814736770
082 _b2447
_a510
100 _a"soh, christina"
245 0 _amaths
260 _bCambridge
_aSingapore
_c2017
300 _a0
944 _cTB
999 _c663085
_d663085