@misc{Krüger_Piotr_(1580-1639)_Petri,
 author={Krüger, Piotr (1580-1639)},
 howpublished={online},
 publisher={Apud Andream Hünefeldt},
 type={stary druk},
 title={Petri Crügeri Mathematici Dantiscani Doctrina Astronomiæ Sphærica : Præceptis methodicis & perspicuis, per Globum, Tabulas, Trigonometriam, tam Veterem quam Logarithmicam, explicata ac demonstrata, Cum Tabulis Ad Eam Pertinentibus},
 keywords={17 w., wydawnictwa przed 1800, stare druki, astronomia},
}