000			00326nam a2200121Ia 4500
005			20251007104213.0
008			251006s9999 xx 000 0 und d
100			_akleen,warner j.
245		0	_a.electronies of mierowave tubes lindsay,p.a. (jt auther)
260			_a1st ed. | .N.Y. Aeademie P.
260			_c1958
942			_cBOK
999			_c2254 _d2254