@misc{Ruthardt_Ernst_Ferdinand_[Korespondencja,
 author={Ruthardt, Ernst Ferdinand},
 address={Breslau},
 howpublished={online},
 language={ger},
 type={text},
 title={[Korespondencja Friedricha Haasego - Haase 824]},
 keywords={Enrich Europeana Plus, correspondence},
}