00517nam a22001817a 450000500170000001000150001702000260003202000230005803500130008103700130009408200120010710000250011924500510014426000380019527000500023330000340028350000180031720130527145741.0  aENG-107244  a9781259006852c525.00  a1259006859c525.00  aEN-90777  bDBAD/PUB  a621.382  a Ramakrishna Rao, P.  aCommunication Systems /cby P. Ramakrishna Rao  aNew DelhibTata McGraw Hillc2013  aP-24, Green Park ExtensionbNew Delhie110016  axvi, 951p. :bill.c24cm(pbk)  aIncluds index