@misc{Heweliusz_Jan_(1611-1687)_Johannis,
 author={Heweliusz, Jan (1611-1687)},
 howpublished={online},
 publisher={nakładem autora},
 publisher={Andrzej Juliusz Müller},
 language={lat},
 type={starodruk},
 title={Johannis Hevelii Epistolæ IV. [...]},
 title={De eclipsi solis anno 1652 observata},
 title={De motu lunæ libratorio},
 title={De observatione deliquii solis anno 1649. habita},
 title={De utriusque luminaris defectu anni 1654},
 keywords={astronomia 17 w.},
}