@misc{Pfeffel_Johann_Andreas_(1674-1750)_Ducatus,
 author={Pfeffel, Johann Andreas (1674-1750)},
 address={Vienna},
 howpublished={online},
 publisher={[s.n.]},
 language={lat},
 title={Ducatus Silesiae tabula},
 keywords={Śląsk, 18 w., mapy, kartografia, Atlas Machnizkich t. V},
}