000 00286nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
082 _a621.317
100 _aPolgar, Claudi
245 0 _aDesign of relay control system
260 _bLondon:Iliffe
_c1968
300 _a305
942 _2ddc
999 _c76721
_d76721