@misc{_Piarum,
 howpublished={online},
 publisher={Wolrab, Jan starszy},
 language={lat},
 type={starodruki},
 title={Piarum et christ[ianarum] institutionum libri tres, in usum Soldalitatis B. Mariae Virginis primum conscripti, una cum [...] Gregorij XIII [...] dictae Sodalitatis approbatione, gratijs et indulgentijs [...]. nunc vero omnium Christianorum pietati [...] destinati [...]},
 keywords={Sodalicja Mariańska, katolicyzm 16w.},
}