000 00306nam a2200121Ia 4500
008 220201s1950 xx 000 0 eng d
082 _a621.31431
100 _aGibbs, IB
245 0 _aTransformer principles & practice
260 _bNew York ; Mc. Graw hill book co.
_c1950
300 _a236
942 _2ddc
999 _c75056
_d75056