00309nam a2200121Ia 45000030006000000080041000060400015000471000032000622450036000942600028001305460012001580050017001700STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKalakota, R; Whinston, A.B.  aFrontiers of Electonic commerce  bPearson Educationc2002  aEnglish20220125160209.0