@misc{_Silesia,
 address={[Amsterdam]},
 howpublished={online},
 publisher={[Blaeu, Joan (1596-1673)]},
 language={lat},
 title={Silesia Ducatus a Martino Helwigio Nissense descriptus},
 keywords={Śląsk, 17 w., mapy, kartografia, Atlas Machnizkich t. V},
}