000 00266nam a2200133Ia 4500
008 241124s9999 xx 000 0 und d
100 _aSingh,R.P.
245 0 _aCommunication systems
250 _a2nd
260 _b-
260 _c0
300 _a584
942 _cBK
999 _c9942
_d9942