IEEE Golbal Telecommunications Conference and Exhibition.IEEE Global Telecommunications Conference and Exhibition(1990 : San Diego):GLOBECOM`90 : communications.V.1.IEEE,1990.
IEEE Golbal Telecommunications Conference and Exhibition.IEEE Global Telecommunications Conference and Exhibition(1990 : San Diego):GLOBECOM`90 : communications.V.2.IEEE,1990.
IEEE Golbal Telecommunications Conference and Exhibition.IEEE Global Telecommunications Conference and Exhibition(1990 : San Diego):GLOBECOM`90 : communications.V.3.IEEE,1990.