@misc{_Mapa_1937,
 copyright={Public Domain},
 address={[S.l.]},
 howpublished={online},
 year={1937},
 publisher={[s.n.]},
 language={pol},
 title={Mapa lasów państwowych Rzeczypospolitej Polskiej},
 keywords={forests, forest maps, biogeographical maps, Poland},
}