000 00282nam a2200121Ia 4500
008 211209s1978 xx 000 0 und d
041 _aeng
082 _a621.381 528 N75 SHE
100 _aSHEPHERD W
245 _aTHYRISTOR CONTROL OF AC CIRCUITS
260 _c1978
300 _a340
999 _c12505
_d12505