000 00339nam a2200145Ia 4500
020 _a9780602575861
082 _bT 341
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100 _a"Ruth Merttens and David kirkby"
245 0 _aAbacus evolve Textbook I
260 _b,Ginn
_c0
300 _a80
944 _cTR
999 _c554542
_d554542