000 00257nam a2200109Ia 4500
008 201121s9999 xx 000 0 und d
100 _aKOSIUR,DAVID
245 0 _aUNDERSTANDING ELECTRONIC COMMERCE
260 _bN.D. PHI
_c2011
300 _c287
942 _cBK
999 _c10702
_d10702