000 00287nam a2200133Ia 4500
008 241129s9999 xx 000 0 und d
100 _aKalakota,Ravi
245 0 _aElectronic commerce
250 _a-
260 _bPearson Education
260 _c2009
300 _a431
942 _cBK
999 _c21894
_d21894