00273nam a2200121Ia 4500100001800000250000600018654001800024245003900042260003300081082001700114300000800131546001200139  aRoja/ Mani M   a2  acommunication  aPrinciples  of  communication Engg  bNandu PubaNew   delhic1998  a621.382bROJ  a198  aENGLISH