Ewing's sarcoma in Negroes.
D000328:Adult; D044383:Black People; D001859:Bone Neoplasms / Q000453:epidemiology*; D002140:California; D002648:Child; D006801:Humans; D012042:Registries; D012512:Sarcoma, Ewing / Q000453:epidemiology*; D001741:Black or African American