000 00286nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aGeorge Kennedy
245 0 _aElectronic communication systems
250 _a4
260 _bTata Mcgraw Hill
_c2004
942 _cBK
999 _c5952
_d5952