@misc{Johannes_de_Sacrobosco_(ca_1195-1256)_Opusculu[m],
 author={Johannes de Sacrobosco (ca 1195-1256)},
 howpublished={online},
 publisher={per Ioannem Singrenium. Expensis [...] Lucae Alansae},
 language={lat},
 title={Opusculu[m] de Sphaera clarissimi philosophi Ioannis de Sacro busto. Theoricae planetaru[m] excellentissimi Astronomi Georgii Purbachii [...] quo Ioannes de Monte regio olim usus est praeceptore. Figvarae item summa diligentia suis ubiq[ue] locis appositae [...].},
 type={starodruk},
 keywords={astronomia, planety, układ słoneczny, Ziemia},
}