00297    a2200121   4500020001500000082001700015100002000032245002700052250000800079260003700087300002000124650003100144  a9971511703  a621.382bHAY  aHaykion, Simion  aCommunication systems   a3rd  aSingaporebJohn wilyc1995g1995  axvi,872p.c24cm  aCOMMUNICATIONS ENGINEERING