000 00273nam a2200121Ia 4500
008 190829s9999 xx 000 0 und d
082 _a621.381 5
_bSAM/E
100 _aSAMUEL SEELY
245 0 _aELECTRON TUBE CIRCUITS
250 _a2nd Ed.
262 _c1978
942 _cBK
999 _c11681
_d11681