@misc{_Mappa_[post,
 copyright={Public Domain},
 address={[S.l.]},
 howpublished={online},
 year={[post 1846]},
 publisher={[s.n.]},
 language={pol},
 title={Mappa Leśna Królestwa Polskiego},
 keywords={maps of forest distribution, forestry maps, Kingdom of Poland, Poland, 19th century},
}