@misc{Engelhart_Valentin_(1516-po1562)_Qvadrans,
 author={Engelhart, Valentin (1516-po1562)},
 howpublished={online},
 publisher={Drukarnia Lorenza Schwencka},
 language={lat},
 type={starodruk},
 title={Qvadrans Planisphaerii, Nobilissimvm Instrvmentvm : Cvivs Vsv Atqve Tractatione uariæ tam Astronomicæ quam Geographicæ expediuntur & explicantur observationes [...]},
}