00334nam a2200133Ia 4500008004100000020001500041041001200056100001800068245006900086250000800155260002100163300000800184650000800192221030s9999    xx            000 0 und d  a0070667551  aEnglish  aL. E. Frenzel 0aPrinciples of Electronic Communication Systemscby L. E. Frenzel  a3rd  bTMHaDelhic2015  a885  aECE