000 00336nam a2200133Ia 4500
008 221117s9999 xx 000 0 und d
082 _bSMI
100 _aSMITH, DONALD A.
245 0 _aABCS OF VACCUM TUBES
260 _bR.J. TARAPOREWALA, BOMBAY
_c1971
300 _a128
650 _aElectronics & Communication Eng.
942 _cBK
999 _c211097
_d211097