000 00274nam a2200121Ia 4500
008 150213s9999 xx 000 0 und d
100 _a"Singal, T.L"
245 _aAnalog & Digital Communication
250 _a2012
260 _bTMH
300 _a621.38041 SIN
938 _b20001
999 _c261
_d261