000 00278nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aKennedy
245 0 _aElectronic Communication Systems
250 _a4
260 _bTata Mcgrawhill
_c1999
942 _cBK
999 _c2233
_d2233