@misc{_Magnus,
 address={Amstelaedami},
 howpublished={online},
 publisher={Schenk, Peter},
 publisher={Valk, Gerard (1652-1726)},
 language={lat},
 title={Magnus Ducatus Finlandiae Nova et accurata delineatio.},
 keywords={mapy, 17 w., Finlandia, kartografia},
}