THIAGAN, VISWANATHAN, . (1992). TELECOMMUNICATION SWICHING SYSTEMS & NETWORKS. NEW DELHI: ASHOK K GHOSH PRENTIC HALLOF INDIA PVT LTD M-97 CONNAUGHT CIRCUS N.DELHI 100 001.
THIAGAN, VISWANATHAN, . 1992. TELECOMMUNICATION SWICHING SYSTEMS & NETWORKS. NEW DELHI: ASHOK K GHOSH PRENTIC HALLOF INDIA PVT LTD M-97 CONNAUGHT CIRCUS N.DELHI 100 001.
THIAGAN, VISWANATHAN, . TELECOMMUNICATION SWICHING SYSTEMS & NETWORKS. NEW DELHI: ASHOK K GHOSH PRENTIC HALLOF INDIA PVT LTD M-97 CONNAUGHT CIRCUS N.DELHI 100 001. 1992.