@misc{Kettler_Julius_Iwan_(1852-1921)_Karte,
 author={Kettler, Julius Iwan (1852-1921) and Müller, Hermann},
 address={Weimar},
 howpublished={online},
 publisher={Verlag des Geographischen Instituts Weimar},
 language={ger},
 title={Karte von Afrika},
 keywords={19 w., mapy, kartografia, Afryka, podziały polityczne},
}