@misc{Romberg_H._Catalog_1891,
 author={Romberg, H.},
 address={St.-Pétersbourg},
 howpublished={online},
 year={1891},
 publisher={Imprimerie de L'Académie Impériale des Sciences},
 language={ger},
 title={Catalog von 5634 Sternen für die Epoche 1875.0},
 keywords={star catalogue, the epoch 1875.0, Pulkova observatory},
}