@misc{Welin_Riesengebirge,,
 author={Welin},
 address={Oldenburg in Holstein},
 howpublished={online},
 publisher={Kunstverlagsanstalt Julius Simonsen},
 language={ger},
 title={Riesengebirge, die Hampelbaude.},
 keywords={grafika niemiecka, akwaforta, Karkonosze (Riesengebirge), widoki, schroniska górskie},
}