000 00327nam a2200145Ia 4500
020 _a9780602575731
082 _b137-T
_a510
100 _a"merttens ruth"
245 0 _aAbacus evolve Text book 2
260 _aOxford
_c2007
300 _a80
944 _cTR
999 _c764978
_d764978