000 00467nam a2200133 4500
999 _c178487
_d178487
027 _aIEC publication 151-4
_q1963
041 _aeng
942 _cSD
110 _aINTERNATIONAL ELECTROTECHNICAL COMMISSION
245 _aIEC publication 151-4 : measurements of the electrical properties of electronic tubes and valves : part 4 : methods of measuring noise factor
260 _aGeneva
_bINTERNATIONAL ELECTROTECHNICAL COMMISSION
300 _a13p.
500 _aSTD3106