000 00291nam a2200121Ia 4500
008 220201s1992 xx 000 0 eng d
082 _a621.312
245 0 _aProtection switch gear & economics
250 _a3
260 _bNew Delhi : Satya prakashan
_c1992
300 _a162
942 _2ddc
999 _c84827
_d84827