000 002760000a22001210004500
245 _aPower system protection : static relays
100 _aRao, T.S.M.
260 _bTata McGraw-Hill
_c1979
300 _a705p.
080 _a621.316.9
_bR3
041 _aEN
942 _cBK
999 _c115031
_d115031