@misc{Keckermann_Bartholomeus_Systema,
 author={Keckermann, Bartholomeus},
 howpublished={online},
 publisher={per Petrum Libonem},
 language={lat},
 title={Systema S.S. theologiae tribus libris adornatum per ...},
 type={stary druk},
 keywords={Keckermann, Bartłomiej (1572-1609), druk teologiczny, teologia - 16 w., Guilielmus, Antonius},
}