Star catalog: positions and proper motions of 258,997 stars for the epoch and equinox of 1950.0. - Smithsonian Astrophysical Observatory (Washington, Smithsonian Institution [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.], 1966)
"Sources for the catalog": v. 1, p. xx-xxiv.
Keywords: Stars -- Catalogs