@misc{_Poland_[post,
 editor={Zakłady Graficzne B. Wierzbicki i Spółka},
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={[post 1921]},
 publisher={Zakł. Graf. B. Wierzbicki i S-ka},
 language={pol},
 type={Image},
 title={Poland : 1:2 000 000},
 keywords={political-administrative maps, state borders, Plebiscite, Poland, Silesia, Czechia, East Prussia},
}