@misc{_Sphaera,
 address={Augsburg},
 howpublished={online},
 publisher={Lotter Conrad Tobias},
 language={lat},
 language={ger},
 type={mapa},
 title={Sphaera Armillaris. Instrumentum artificiale Orrery ab inventore appellatum},
 keywords={Ziemia -- mapy},
}