000 00387nam a2200169Ia 4500
001 3160
003 IN-NITTTR
005 20251114232943.0
008 251113s9999||||xx |||||||||||||| ||eng||
040 _beng
040 _cIN-NITTTR
041 _aeng
082 _a621.381512 S23V
100 _aSpangenberg, Karl R.
245 0 _aVacuum tubes /
_cSpangenberg, Karl R.
942 _2ddc
_cBK
999 _c5302
_d5302