@misc{_Riesen-Gebirge_[ca,
 editor={Köhler, Alexander. Wyd.},
 copyright={Public Domain},
 address={Dresden},
 howpublished={online},
 year={[ca 1926]},
 publisher={Verlag von Alexander Köhler},
 language={ger},
 title={Riesen-Gebirge},
 keywords={tourist maps, Giant Mountains},
}