00259nam a2200109Ia 4500008004100000100001900041245002400060260002700084260000900111546001200120999001700132170619s9999    xx            000 0 und d  aKalakota- Ravi 0aElectronic commerce  bSingapore Pearson Pub.  c2000  aENGLISH  c21815d21815