000 00353nam a2200145Ia 4500
020 _a9780602575748
082 _b1754
_a510
100 _a"Merttens, Ruth","Ruth Merttens"
245 0 _aAbacus evolve 4 textbook 3
260 _bPEARSON
_aOXFORD
_c2007
300 _a80
944 _cBK
999 _c496834
_d496834