000 00302nam a2200121Ia 4500
008 160122s9999 xx 000 0 und d
041 _aEnglish
100 _aP Gnanasivam
245 _aTelecommunication Switching and Networks
260 _bDelhi:new age
_c2005
300 _a324p.
650 _aElectronic
999 _c1434
_d1434