000 00285nam a2200121Ia 4500
008 211209s1973 xx 000 0 und d
041 _aeng
082 _a621.319 15 N73 OPP/HES
100 _aOPPENHEIMER
245 _aDIRECT AND ALTERNATING CURRENTS
260 _c1973
300 _a580
999 _c13885
_d13885