000 00331nam a2200145Ia 4500
020 _a9780602268237
082 _b2220
_a500
100 _a"N/A"
245 0 _aAbacus: Shape, Space and Data Year 4
260 _bGinn & Company
_c0
300 _a0
944 _cBK
999 _c275502
_d275502