000 00303nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aKrishna Kumar D N
245 0 _aTelecommunication and Switching
250 _a1
260 _bSanguine Technical Publishers
_c2007
942 _cBK
999 _c12824
_d12824