000 00264nam a2200109Ia 4500
008 220201s1969 xx 000 0 eng d
100 _aELECTRICITY COUNCIL
245 0 _aPOWER SYSTEM PROTECTION
260 _aLONDON
_bMACDONALD
_c1969
300 _a135
942 _2ddc
999 _c89041
_d89041