000 00271nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aAjay Sharma
245 0 _aCommunication systems
250 _a1
260 _bSatya Prakashan
_c2003
942 _cBK
999 _c5211
_d5211