@misc{Rümker_Carl_Mittlere_1843,
 author={Rümker, Carl},
 address={Hamburg},
 howpublished={online},
 year={1843},
 publisher={Perthes - Besser und Mauke},
 language={ger},
 title={Mittlere Oerter von 12000 Fix-Sternen für den Afgang von 1836},
 keywords={star catalogue, star positions from 1836 year},
}