00318nam a2200121 a 450000500170000002000150001708200200003210000190005224500370007126000390010830000250014770000240017220251203110536.0  a8178080575  a658.840285bKAL  aKalakota, Ravi  aFrontiers of Electronic Commerce  aNew DelhibPearson Educationc2004  axiv,850p.c24 cm. PB  aWhinston, Andrew B.