@misc{Ravenstein_Hans_(1866–1934)_Ravenstein's,
 author={Ravenstein, Hans (1866–1934)},
 address={Frankfurt a.M.},
 howpublished={online},
 publisher={Verlag Ludwig Ravenstein},
 language={ger},
 title={Ravenstein's Rad- und Automobilkarte der Umgegend von Breslau},
 keywords={20 w., kartografia, mapy samochodowe, Wrocław i okolice, Dolny Śląsk},
}