@book{3510,
	author = {KESSLER, GARY C.},
	title = {ISDN : },
	publisher = {MCGRAW-HILL},
	year = {1993},
	series = {MCGRAW-HILL SERIES ON COMPUTER  COMMUNICATIONS},
	address = {NEW YORK: },
	edition = {2},
	note = {INCLUYE INDICE.}
}