000 00310nam a2200121Ia 4500
008 160710s1965 xx 000 0 und d
082 _a621.38 GEW
100 _aGEWARTOWSKI, J. W.
245 _aPRINCIPLES OF ELECTRON TUBES
260 _bD. VAN NOSTRAND COMPANY, INC.
_c1965
300 _a655
942 _2ddc
_cB
999 _c28660
_d28660