000 00323nam a2200121Ia 4500
008 160710s1946 xx 000 0 und d
082 _a621.384 W 69 T
100 _aWITTS,ALFRED T.
245 _aTHERMIONIC VALVES IN MODERN RADIO RECEIVERS
260 _bSIR ISAAC PITMAN & SONS LTD.
_c1946
300 _a218
942 _2ddc
_cB
999 _c6537
_d6537