SSupernovae as distance indicatorsSupernovae as distance indicatorsde Smithsonian Astrophysical ObservatoryMateriasRadio astronomySupernovae as distance indicatorsCongressesExtragalactic distancesMeasurementSupernovaeDistances extragalactiquesCongrèsMesureRadioastronomie
AAnnals of the Astrophysical Observatory of the Smithsonian IAnnals of the Astrophysical Observatory of the Smithsonian Institution; Volume 1
AAnnals of the Astrophysical Observatory of the Smithsonian IAnnals of the Astrophysical Observatory of the Smithsonian Institution; Volume 2
SSmithsonian Astrophysical Observatory Star CatalogSmithsonian Astrophysical Observatory Star Catalog
NNon-stellar objects used in preparing the SAO star atlas cooNon-stellar objects used in preparing the SAO star atlas coordinates at equinox 1950.0