@misc{Sacro_Bosco_Joannes_de_(c._1195_–_1256)_Ioannis,
 author={Sacro Bosco, Joannes de (c. 1195 – 1256)},
 howpublished={online},
 publisher={Haller, Jan},
 publisher={Ungler, Florian},
 language={lat},
 type={starodruki},
 title={Ioannis de Sacrobosco [...] sphericu[m] opusculum, cum lucida et familiari expsitione [!] per Matthaeum Shamotulien[sem] [...]},
 keywords={astronomia 13w., geografia 13w.},
}