@misc{Herolt_Ioannes_Sermones,
 author={Herolt, Ioannes},
 address={Köln},
 howpublished={online},
 publisher={Köln},
 publisher={[Ulr. Zell]},
 language={lat},
 type={inkunabuł},
 title={Sermones Discipuli de tempore et de sanctis cum Promptuario exemplorum et de Beata Virgine},
 keywords={Incunabula -- Poland -- Bydgoszcz -- Catalogs, Early printed books -- 15th century},
}