@misc{Oldenburg_Sergej_Teodorovic_[List,
 author={Oldenburg, Sergej Teodorovic},
 address={Petersburg},
 howpublished={online},
 language={ger},
 type={text},
 title={[List do Alfreda Hillebrandta - Hill. 131]},
 keywords={Enrich Europeana Plus, correspondence},
}