@misc{Sierpowski_Stanisław_League,
 author={Sierpowski, Stanisław},
 copyright={Sierpowski, Stanisław},
 howpublished={online},
 language={eng},
 title={League of Nations. Twenty-Eight Session of the Council, Secret Meeting 13.03.1924},
 keywords={Liga Narodów, polityka międzynarodowa 20w.},
}