@misc{Garcaeus_Johannes_jun._Tractatus,
 author={Garcaeus, Johannes jun.},
 howpublished={online},
 publisher={excudebat Iohannes Schwertel},
 language={lat},
 type={starodruk},
 title={Tractatus brevis et utilis de erigendis figuris coeli verificationibus, revolutionibus et directionibus},
 keywords={Astronomia, Mikołaj Kopernik, tablice astronomiczne, tablice Pruskie},
}