00760nam a2200205Ia 4500003000400000005001700004008004100021040002000062041000800082082002400090100003200114245006400146264005000210300001400260650004000274650003600314942001500350952017400365999001500539AIT20260525142627.0221231s9999    xx            000 0 und d  aATRIAbengcAIT  aeng  a621.38 JOLqAIT222  aJOlley E. H.eAuthor918552 0aIntroduction to telephony and telegraphy /cby JOlley E. H.34aNew Delhi :bAH Wheeler Publication,c©1997.  aX, 413 p.  aElectronics and Communication91013  aTelephony and Telegraphy918553  cBE_BK2ddc  00102ddc4071aAITbAITd2001-01-29eMega Booksg185.00l0o621.38 JOLpBE02190r2022-12-31v185.00w2022-12-31yBE_BKzElectronics and CommunicationA14B12/01/2001D  c1807d1807