000 00326nam a2200121Ia 4500
001 123536
008 170722s9999 xx 000 0 und d
110 _aGreenwood Jr, India A.
245 _aElectronic instruments /
260 _c1948.
490 _aMassachysetts Institute of technology graduation laborary se
942 _cGEN
999 _c60754
_d60754