00274nam a2200109Ia 4500100001500000650002600015654001200041245004000053260003800093082002100131546001200152  aKatre/J.S   aDigital Communication  aDigital  aPrinciples of digital communication  bTech-Max PublicationsaPunec2003  a621.382/KATbKAT  aENGLISH