@misc{Kleefeld_Johann_Gottfried_(1763-1845)_Acta,
 author={Kleefeld, Johann Gottfried (1763-1845) and Rathke, Martin Heinrich (1793-1861) and Skusa, August Wilhelm (1791-1856)},
 howpublished={online},
 language={ger},
 language={lat},
 type={manuscripts},
 title={Acta Societatis Physicae Experimentalis. T. 23, 1818-1832},
 keywords={manuscript, research, scientific papers, Naturforschende Gesellschaft in Danzig},
}