000 00303nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aLouis E Frenzel
245 0 _aPrinciples of Electronic Communication Systems
250 _a3
260 _bTata Mcgraw Hill
_c2008
942 _cBK
999 _c14930
_d14930