000 00297nam a2200109Ia 4500
008 210616s9999 xx 000 0 und d
100 _aK. Chandrashekhar
245 0 _aDigital Switching Systems
260 _c2009
650 _aEngineering and Allied Operations
_bElectrical Engineering
942 _cBK
999 _c5954
_d5954