000 00254nam a2200097Ia 4500
008 160710s1949 xx 000 0 und d
100 _aELECTRONICS WORLD
245 _aELECTRICAL WORLD,MAY,NO.21
260 _bMCGRAW HILL PUBLICATION
_c1949
942 _2ddc
_cB
999 _c40672
_d40672