@misc{Prutz_Robert_Eduard_[Korespondencja,
 author={Prutz, Robert Eduard},
 address={Halle},
 howpublished={online},
 language={ger},
 type={text},
 title={[Korespondencja Friedricha Haasego - Haase 759]},
 keywords={Enrich Europeana Plus, correspondence},
}