@misc{_Tractatus,
 address={[Merseburg]},
 howpublished={online},
 publisher={[Brandis, Marcus (14..-15..). Druk.]},
 language={lat},
 title={Tractatus de verbo intelligibili vel rei collectus ex doctore sancto.},
 keywords={Kolekcje Piastowskie, 15 w., inkunabuły},
}