000 00353nam a2200121Ia 4500
008 240112s9999 xx 000 0 und d
082 _aMOR-E
_b621.381
100 _aMorecroft, John H
245 0 _aElectron tubes and their application
260 _a New York
_bJohn Wiley & Sons
_c1933
650 _aElectronics engineering; Applied physics
942 _cBK
999 _c12992
_d12992