000 00259nam a2200097Ia 4500
008 160710s1949 xx 000 0 und d
100 _aELECTRONICS WORLD
245 _aELECTRICAL WORLD, FEB,JUNE OCT NO. 7,25,15
260 _bMC GRAW HILL
_c1949
942 _2ddc
_cB
999 _c40673
_d40673