00283nam a2200121Ia 4500008004100000041001200041082001600053100001900069245002800088260002900116300000800145650000800153221030s9999    xx            000 0 und d  aEnglish  a105.23bRam  aS. Ramabhadran 0aBasic Telecommunication  bKhanna Pub.aDelhic1986  a485  aECE