Ngc 2000.0 : The Complete New General Catalogue and Index Catalogues of Nebulae and Star Clusters.
Dreyer, J. L. E.
Ngc 2000.0 : The Complete New General Catalogue and Index Catalogues of Nebulae and Star Clusters.
5231135 / S615N
Ngc 2000.0 : The Complete New General Catalogue and Index Catalogues of Nebulae and Star Clusters.
5231135 / S615N