000 00272nam a22001217a 4500
020 _a070676607
082 _bWAG
_a621
100 _aWagner, C.F
245 _aSymmetrical components
260 _aLondon
_bMcgraw hill book company
_c1933
300 _a437 Pages
942 _cL
999 _c19893
_d19893