000 00357nam a2200133Ia 4500
008 231217s9999 xx 000 0 und d
041 _aEnglish
082 _a032
_bPl
100 _aLewis, E. H
245 6 _aThe A B C of Vacuum Tubes In Radio Reception
260 _aNew York
_bThe Norman W . Henley Publishing CO.
_c1922
300 _a132Pages
942 _cBK
999 _c520
_d520