@misc{Eckstein_Adolf_[Ordenstein,
 author={Eckstein, Adolf},
 address={Berlin},
 howpublished={online},
 publisher={Adolf Eckstein Verlag, Berlin- Charlottenburg},
 language={ger},
 title={[Ordenstein Heinrich]},
 keywords={portrait, man, professor, Ordenstein Heinrich, Eckstein, Adolf},
}