@misc{_Polonica,
 howpublished={online},
 language={ger},
 language={lat},
 language={pol},
 title={Polonica seu collectio variarum litterarum de rebus polonicis annis 1669-1670 lingua polonica, latina et germanica scriptarum},
 keywords={polonica, 17 w., 18 w., dokumenty, historia, sejm, akta sejmikowe},
}