000 00375nam a2200145Ia 4500
020 _a9780602575878
082 _b2265
_a510
100 _a"Ruth Merttens and David Kirkby"
245 0 _aAbacus evolve 6 Text book 2
260 _bPearson Education Limited
_aLondon
_c2007
300 _a80
944 _cTR
999 _c549079
_d549079