000			00328nam a2200121Ia 4500
001			123460
008			170722s9999 xx 000 0 und d
100			_aCollins, George B.
245			_aMicrowave magnertrons /
260			_c1948.
490			_aMassachusetts Institute of Technology Radiation Laboratory series,6
942			_cGEN
999			_c52635 _d52635