@misc{Herschel_John_F._W._Observations_1833,
 author={Herschel, John F. W.},
 address={London},
 howpublished={online},
 year={1833},
 publisher={Richard Taylor},
 language={eng},
 title={Observations of nebulÆ and clusters of stars , made at slough, with a twenty-feet reflrctor, between the years 1825 and 1833},
 keywords={catalogue of nebulae, star clusters catalogue, the epoch 1830.0., Herschel's observations},
}