000 00418nam a2200169Ia 4500
008 180424s9999 xx 000 0 und d
084 _a621.381 5 W1
100 _a"Gewartowski, J W"
245 0 _aPrinciples of Electron Tubes
250 _a\\196500ENGGPSX
260 _aD Van Nostrand
260 _b1965
260 _cPrinceton
300 _axvi+655p
500 _aincludes index and biblioraphy
942 _cBK
999 _c12453
_d12453