000 00353nam a2200157Ia 4500
020 _a9780602575731
040 _cPK-LaCSN
082 _a510
_bMER
100 _aMerttens, Ruth
245 0 _aAbacus evolve textbook 2-4
260 _c2007
_bGINN
_aUK
300 _a80
942 _cTR
999 _c859572
_d859549