title: A study of the Rous sarcoma virus by density gradient centrifugation.
mesh_terms: D002499:Centrifugation, Density Gradient; D009369:Neoplasms; D052736:Rous sarcoma virus; D012509:Sarcoma / Q000821:virology*; D014780:Viruses
keywords: SARCOMA/virology; VIRUSES