00396n a2200169 a 4500 B B 001498 20220201162614.0 384 M2 GEN Ranjan, Mohan Sundara The Telecom Story Second New Delhi National Book Trust India 1982 206 Telecommunication,General G 0 0 0 0 SGGSCC SGGSCC 2020-09-22 0 384 M2 GEN 1788 2020-09-22 00:00:00 2020-09-22 BK 1495 1495