000 00286nam a2200121Ia 4500
008 241124s9999 xx 000 0 und d
100 _aKennedy, G.;Davis, B.
245 0 _aElectronic Communication Systems
260 _bTata McGraw Hill
260 _c1985
300 _a741
942 _cBK
999 _c4292
_d4292