@misc{Rieckher_Julius_Wilhelm_Helfrid_[Korespondencja,
 author={Rieckher, Julius Wilhelm Helfrid},
 address={Heilbroim},
 howpublished={online},
 language={ger},
 type={text},
 title={[Korespondencja Friedricha Haasego - Haase 783]},
 keywords={Enrich Europeana Plus, correspondence},
}