000 00273nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
082 _a621.3
_bSON
100 _aSoni,ML
245 0 _aTechnical electricity
260 _bJain brothers
_c1968
300 _a348
942 _2ddc
999 _c74286
_d74286