000 00360nam a2200133Ia 4500
008 211214s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aHarvey , A F
245 0 _aHigh frequency thermionic tubes
260 _bCHAPMAN & HALL, LTD.
_aLONDON
_c1946
300 _aXII,235P p.
653 _aENGINEERING
942 _c1
999 _c35594
_d35594