000 00251nam a22001097a 4500
082 _a621.317 POL'D
100 _aPLOGAR, CLAUDE
_978223
245 _aDESIGN AND RELAY CONTROL SYSTEMS
260 _aLONDON
_bILIFFE
_c1968
300 _a305P
942 _cBK
999 _c583380
_d583380