00623nam a2200193 a 450000500170000000800410001702000180005804100080007608200120008410000250009624500540012125000120017526400640018730000150025170000180026694200070028499900170029195201210030820260717092200.0260717s2008    ii            000 0 eng d  a9780074636824  aeng04a621.3821 aRoddy, Dennis, 1931-10aElectronic Communications /cRoddy, Dennis, 1931-  a4th ed. 1aNew Delhi :bDorling Kindersley (India ) Pvt. Ltd.,cc2008.  aix, 723 p.1 aCoolen, John.  cBK  c48666d48666  001040708DCaBKBCLbBKBCLd2008-12-14g415.00l0o621.382 RODp61079r2026-07-17 09:22:00v415.00w2026-07-17yBK