00474pamaa2200157 4500 0000023383 20060614090000.0 0070381771 621.3845 HAR 1999 TK5103.483 HAR 1999 HARTE GSM superphones Lawrence Harte, Richard Levine and Geoff Livingston. New York: McGraw Hill, 1999. xxii, 348p.: ill.; 25cm. Includes an index Global system for mobile communications