@misc{Helwig_Martin_(1516-1574)_Silesiae,
 author={Helwig, Martin (1516-1574)},
 howpublished={online},
 publisher={[Jan Baptist Vrients]},
 language={łaciński},
 type={map},
 title={Silesiae Typus a Martino Helwigio Nissense descriptus et Nobili doctoque viro Domino Nicolao Rhedingero ded.},
 keywords={1601-1700, Geografia i nauki o ziemi, Kartografia, Śląsk},
}