@misc{Mercator_Gerard_(1512-1594)_Helvetia,
 author={Mercator, Gerard (1512-1594)},
 address={[Amsterdam]},
 howpublished={online},
 publisher={Guiljelmus Blaeu},
 language={lat},
 type={mapa},
 title={Helvetia cum finitimis regionibus confoederatis},
 keywords={Szwajcaria -- mapy -- 17 w},
}