00505pamaa2200169 4500 0000040296 20110308090000.0 0262232057 658.800285 WES HF5548.32 WES 1999 WESTLAND Global Electronic Commerce : theory and case studies J. Christopher Westland, Theodore H. K. Clark. London: The MIT Press, 1999. xi, 592p.; 24 cm. DBAD Electronic commerce Clark, Theodore H. K.