@misc{Friedrich_Wilhelm_IV_[List,
 author={Friedrich Wilhelm IV},
 address={Düsseldorf},
 howpublished={online},
 language={ger},
 type={text},
 title={[List do J. D. F. Neigebaura - Neigebaur 64]},
 keywords={Enrich Europeana Plus, correspondence},
}