@misc{_Katechyzm_[przed,
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={[przed 22 I] 1791},
 publisher={Gröll, Michał (1722-1798). Druk.},
 language={pol},
 title={Katechyzm Narodowy},
 type={Text},
 URL={http://www.rcin.org.pl/Content/114898/PDF/WA248_141663_XVIII-1-1149_katechyzm-narodo_o.pdf},
 keywords={Polish journalistic writing - 18th c.},
}