@misc{Merian_Matthaeus_(1593–1650)_Polonia_1638],
 author={Merian, Matthaeus (1593–1650)},
 copyright={Public Domain},
 address={[Frankfurt am Main},
 howpublished={online},
 year={1638]},
 publisher={Matthäus Merian},
 language={lat},
 title={Polonia Regnum, et Silesia Ducatus},
 keywords={chorographic maps, Poland, Silesia, 17th century},
}