00311nam a2200109Ia 4500003000400000008004100004040001600045082001700061245006000078260005300138300001000191GCL140319s9999    xx            000 0 eng d  aGCL / cGCL04a621.382bG P10aPrinciples of Digital and Analog Communicotions, 2rd ed  a[S.N] : bMacmillan Publishing Company ، c1993  a576 P