00509nam 2202672 45000010005000000030023000050050009000280080041000370820008000780720023000860200018001091000021001272600028001482500006001762450062001826500023002446500028002676500022002952672StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a621 aAn introduction to a0-07-099341-6 aJohn. C. Hancock bTat mc Graw-hill c1961 a2 aAn introduction to the principles of communication theory aAn introduction to aof communication theory ato the principles