000 00373nam a2200169Ia 4500
008 240220s9999 xx 000 0 und d
041 _aENG
100 _aCarlson A. B.
245 0 _aCommunication systems
260 _aNULL
260 _bMcgraw Hill International Edition
260 _c1975
300 _a686p.
365 _b276.25
650 _aETC
942 _cDBK
999 _c20787
_d20787