@misc{Neumann_Ludwig_Der,
 author={Neumann, Ludwig and Dölker, Franz},
 address={Stuttgart},
 howpublished={online},
 publisher={Julius Weise},
 language={ger},
 title={Der Schwarzwald in Wort und Bild},
 keywords={Schwarzwald, Niemcy, góry, geografia, turystyka, album},
}