@misc{_Pacta,
 howpublished={online},
 language={ger},
 language={lat},
 title={Pacta Welaviensia et Brombergensia inter Dn. Joannem Casimirum […] et Fridercum Wilhelmum […]},
 type={stary druk},
 keywords={Jan II Kazimierz (1609-1672), król Polski, traktat welawsko-bydgoski, stary druk – 18 w., Fryderyk Wilhelm I (1620-1688)},
}