000 00346nam a2200109Ia 45e0
008 181001s1957 xx 000 0 und d
100 _aGearg M. Ettinger
245 0 _aMagnetic amplifiers
260 _aN.Y.
_bJohn Willey Inc. N.Y.
_c1957
300 _a102
942 _2ddc
_cBK
999 _c516
_d516