@misc{Valerius_Cornelius_(1512-1578)_De,
 author={Valerius, Cornelius (1512-1578)},
 address={Antwerpiae},
 howpublished={online},
 publisher={Ex officina Christophori Plantini},
 language={lat},
 type={starodruk},
 title={De sphaera, et primis astronomiae rudimentis, libellus utilissimus : Cui adiecta sunt brevia quaedam de geographia praecepta maxime necessaria / Conscripta olim […] nunc primum recognita a Valerio Cornelio Vltraiectino},
 keywords={Polska -- 16 w., Early printed books -- 16th century, Sixteenth century},
}