@misc{Bartholomaeus_de_Usingen_Libellvs, author={Bartholomaeus de Usingen}, howpublished={online}, publisher={[Köln]: [Gymnich]}, language={lat}, type={starodruk}, title={Libellvs F[ratris] Bartholomei De Vsingen Avgvstiniani De Fide, Gratia, et Operibus, ad Christianismum uerum necessarijs}, keywords={Bartholomaeus de Usingen [1460-1516]}, }