000 00269nam a2200121Ia 4500
008 220201s1970 xx 000 0 eng d
082 _a621.3
100 _aNelkon, M
245 0 _aElectricity
260 _bLondon: Edward arnaldo
_c1970
300 _a487
942 _2ddc
999 _c77016
_d77016