000 00259nam a2200109Ia 4500
008 160710s1949 xx 000 0 und d
100 _aEASTERN,AUSTIN
245 _aFUNDAMENTALS OF VACUMTUBES
260 _bMCGRAW HILL
_c1949
300 _a644
942 _2ddc
_cB
999 _c16941
_d16941