00975nam0-2200337li-450 99000015903020331620180312154911.00-201-50016-70015903USA010015903(ALEPH)000015903USA01001590320001109d1992----km-y0itay0103----baengUSISDN in perspectiveFred R. GoldsteinReading (Mass.) [etc.]Addison-Wesleycopyr. 1992telecomunicazioni sistema isdn621.382.Goldstein,Fred R.754886Sistema bibliotecario di Ateneo dell' Università di SalernoRICA990000159030203316621.382 GOL0006739BKTEC1996021520001110USA01171220020403USA011623PATRY9020040406USA011612ISDN in perspective1519273UNISA