000 00206 a2200097 4500
001 6177
100 _aHenney, K
245 _aElectron tubes in industry
260 _a
_bMcGraw-Hill
_c
090 _c5065
_d5065
942 _aNUST-CAE
_cM
_c31451
999 _c241250
_d241250