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024 _a36015
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aD65:485, H1
100 _aReich Herbert J
245 0 _aPrinciples of electron tubes
260 _c1941
300 _ap.
_ccm.
942 _hD65:485, H1
_cTEXL
_2CC
999 _c91281
_d91281