000 00209 a2200097 4500
001 4375
100 _aEastman,A.V
245 _aFundamentals of vacuum tubes
260 _a
_bMcgrawhill
_c
090 _c3573
_d3573
942 _aNUST-CAE
_cM
_c28591
999 _c239448
_d239448