000 00237nam a2200109Ia 4500
020 _a812650157X
082 _a621.382
100 _aHORAK, RAY
245 _aCOMMUNICATION SYSTEMS & NETWORKS
260 _aNEW DELHI
_b IDG
_c2000
942 _cBK
999 _c3543
_d3543