@misc{_Maps_1933,
 editor={Paderewski, Ignacy Jan (1860–1941). Oprac.},
 copyright={Public Domain},
 address={[S.l.]},
 howpublished={online},
 year={1933},
 publisher={[s.n.]},
 language={eng},
 title={Maps representing western frontiers of Poland : in 10th century, year 1477, year 1547, year 1559, year 1648, year 1740, year 1786, year 1932},
 keywords={historical atlases, state borders, Poland},
}