000 00221nam a2200085Ia 4500
008 160710s1956 xx 000 0 und d
245 _aELECTRONICS VOL. 29 JUNE 1956
260 _aNEW YORK
_bMCGRAW HILL
_c1956
942 _2ddc
_cB
999 _c31112
_d31112