@misc{Engelhart_Valentin_(1516-post1562)_Libellvs,
 author={Engelhart, Valentin (1516-post1562)},
 howpublished={online},
 publisher={Per Martinum de Dolgen},
 language={lat},
 type={starodruk},
 title={Libellvs De Compositione Et Vsv Qvadrantis Astronomici ac Geometrici Scriptus a Valentino Engelhartto Gothano [...].},
 keywords={astronomia, przyrządy astronomiczne, kwadrant},
}