@misc{Kleefeld_Johann_Gottfried_(1763-1845)_Kleefelds,
 author={Kleefeld, Johann Gottfried (1763-1845)},
 howpublished={online},
 language={pol},
 type={manuscripts},
 title={Kleefelds Beobachtungen 1819},
 keywords={meteorology, manuscript, Gdańsk, Naturforschende Gesellschaft in Danzig},
}