00346nam a2200133Ia 4500001000500000005001700005008004100022020001600063082001800079100002300097245005100120260001800171650002300189554120261006003854.0120911s9999    xx            000 0 und d  a0132497980   a621.31042 GRI  aGriffiths, Douglas  aPrinciples and problems of electrical machines  aPrentice Hall  aElectric machinery