@misc{Sweighhard_von_Freihausen_Johann_Jacob._Ars,
 author={Sweighhard von Freihausen, Johann Jacob.},
 copyright={PAN Biblioteka Gdańska},
 howpublished={online},
 publisher={Typis Eli Michaelis Zinck,},
 type={stary druk},
 title={Ars Magnesia De Natvra, Viribvs Et Prodigiosis Effectibvs Magnetis},
 keywords={magnetyzm, XVII wiek nauka},
}