00340nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001300084245005700097260003600154300000800190650000800198221030s9999    xx            000 0 und d  a8121900530  aEnglish  a105.23bSin  aA. Singh 0aPrinciples of Communication Engineeringcby A. Singh  bS. Chand & Co.aNew Delhic1999  a607  aECE