@misc{Hertz_Martin_Julius_[Korespondencja,
 author={Hertz, Martin Julius},
 address={Greifswald},
 howpublished={online},
 language={ger},
 type={text},
 title={[Korespondencja Friedricha Haasego - Haase 443]},
 keywords={Enrich Europeana Plus, correspondence},
}