Importante! Sobre el catálogo
| Smithsonian Astrophysical Observatory. | ||||
| 1. | Star catalog : positions and proper motions of 258,997 stars for the epoch and equinox of 1950.0. / prepared by the staff [of the] Smithsonian Astrophysical Observatory. | 1966 | Libro |
002.002
SMI 
|
| Autores varios | ||||
| 2. | The Einstein Observatory catalog of IPC x-ray sources / the Einstein Catalog Committee, D.E. Harris (chair) ... [et al.]. | 1993 | Libro |
002.065
HAR
|