00373nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001600084245007600100260003400176300000800210650002100218221030s9999    xx            000 0 und d  a8185614369  aEnglish  a105.23bJol  aE. H. Jolly 0aIntroduction to Telephony & Telegraphy ( DEPARTMENTAL )cby E. H. Jolly  bWheeler Pub.aAllahabadc1992  a413  aECE Departmental