@misc{Gill_David_Catalogue_1884,
 author={Gill, David},
 address={London},
 howpublished={online},
 year={1884},
 publisher={Eyre and Spottiswoode},
 language={eng},
 title={Catalogue of 4,810 stars for the epoch 1850.},
 keywords={catalogue of stars, the epoch 1850, Cape astronomical observatory},
}