000			00378nam a2200133Ia 4500
008			211214s9999 xx 000 0 und d
040			_cJayakar Knowledge Resource Centre
100			_aKohl, W H
245		0	_aMaterials technology for electron tubes
260			_bReinhold Publication Corporation _aNew York _c1951
300			_axi, 492 p.
653			_aEngineering
942			_c1
999			_c28821 _d28821