00338nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001300084245005700097260003400154300000800188650000800196221030s9999    xx            000 0 und d  a8121900530  aEnglish  a105.23bSin  aA. Singh 0aPrinciples of Communication Engineeringcby A. Singh  bS.Chand & CoaNew Delhic2001  a607  aECE