000 00320nam a2200157Ia 4500
082 _aJ510/Che
100 _aCheh, Chelsea
365 _e
_ 4.90
526 _dNTB
526 _aUG
942 _cBK
245 _aMental Mathematics Book 1
260 _aSingapore
_bSingapore asian
_c2009
300 _a56
546 _aE
999 _c76862
_d76862