@misc{_Polska_[ca,
 copyright={Public Domain},
 address={[S.l.]},
 howpublished={online},
 year={[ca 1919]},
 publisher={[s.n.]},
 language={pol},
 title={Polska a Czechy : porównanie produkcyi rolnej między Polską a Czechosłowacyą},
 type={Image},
 keywords={political-administrative maps, population, agriculture, statistics, Central Europe, Poland, Czechoslovakia},
}