000 00509 a2200157 4500
003 OSt
008 090312t xxu||||| |||| 00| 0 eng d
082 _a621.395.12
_bALI
100 _aAli, Syed Riffat
245 _aDigital switching systems
_bsystem reliability and analysis
300 _a219p.
653 _a621.395.12
_aTelephone switching systems electronic - reliability
_aDigital telephone systems reliability
942 _2ddc
_cBK
260 _aNew Delhi
_bTata McGraw Hill
_c2003
020 _a0070010692
999 _c351167
_d351167