@misc{_Ladožskoj_[ante,
 editor={Grimmel', Iogann-Elias (1703–1759). Rys.},
 editor={Imperatorskaâ akademiâ nauk (Petersburg)},
 copyright={Public Domain},
 address={[St. Petersburg]},
 howpublished={online},
 year={[ante 1742]},
 publisher={Akademia Nauk},
 language={rus},
 language={lat},
 title={Ladožskoj Kanal = Canalis Ladogensis : [mapa]},
 keywords={topographical maps, Ladoga region, New Ladoga Canal, 18th century},
}