@misc{Röpell_Richard_(1808-1893)_Polen,
 author={Röpell, Richard (1808-1893)},
 address={Gotha},
 howpublished={online},
 publisher={Friedrich Andreas Berthes},
 language={ger},
 title={Polen um die Mitte des 18. Jahrhunderts},
 type={książka},
 keywords={18 w.},
}