@misc{Kolberg_Oskar_(1814–1890)_Mazowsze.,
 author={Kolberg, Oskar (1814–1890)},
 copyright={Instytut im. Oskara Kolberga},
 howpublished={online},
 publisher={Instytut im. Oskara Kolberga},
 language={pol},
 type={monografie},
 title={Mazowsze. Suplement do tomów 24-28},
 keywords={Oskar Kolberg},
}