@misc{Poniatowski_Stanisław_(1884-1945)_Eastern,
 author={Poniatowski, Stanisław (1884-1945)},
 howpublished={online},
 language={pol},
 type={text},
 title={Eastern Slavs},
 keywords={Slavs' culture, Great Ruthenia, Small Ruthenia, Ukrainians, Belarus' culture},
}