@misc{Sierpowski_Stanisław_Twenty-third,
 author={Sierpowski, Stanisław},
 copyright={Sierpowski, Stanisław},
 howpublished={online},
 language={eng},
 title={Twenty-third session of the Council. Record bu the Secretary - General of Secret Meeting held on 03.02.1923},
 keywords={Liga Narodów, polityka międzynarodowa 20w.},
}