00269nam a2200121Ia 4500100001700000250000600017654001800023245003900041260003000080082001700110300000800127546001200135  aGoyal/ S.C.   a2  acommunication  aPrinciples  of  communication Engg  bTechnical PubaPunec1996  a621.382bGOY  a248  aENGLISH