@misc{_Der_1809,
 editor={Mellin, Ludwig August von (1754–1835). Rys.},
 editor={Guimpel, Friedrich (1774–1839). Ryt.},
 copyright={Public Domain},
 address={Berlin},
 howpublished={online},
 year={1809},
 publisher={[s.n.]},
 language={ger},
 language={fre},
 title={Der Revalsche Kreis = Le Cercle de Reval},
 keywords={topographical maps, Tallin region, 18th century},
}