00290nam a2200109Ia 4500008004100000041000800041082002000049100001600069245004100085260004600126300000800172211209s1992    xx            000 0 und d  aeng  a621.382 N92 BIS  aBISWAS, N N  aPRINCIPLES OF CARRIER COMMUNICATION   aBOMBAYbMEDIA PROMOTERS PUBLICATIONc1992  a232